An adventure logic game, Crystal Cave: Lost Treasures challenges the player to exhibit the required ingenuity to move through the game's treacherous environs, pulling off the right moves at the right time in order to find the treasure and move on to the next level. The game's riddle-packed levels span three different graphic scenarios.

See the developer's gameplay video.

With over 100 levels at $0.99, Crystal Cave: Lost Treasures is a great value and should have definite appeal for fans of the classic version, Boulder Dash, or logic puzzlers in general. This one comes highly recommended. Those wanting to try before they buy can grab Crystal Cave Classic Lite [App Store] or the OS X and Windows demo versions.

To mark the release of this new title, Rake in Grass has lowered the price of the original Crystal Cave Classic from $3.99 down to $1.99.

And in further Rake in Grass news, the studio will shortly be releasing a match-three action puzzler known as Phantasia, developed by 300AD.

Phantasia, designed to appeal to gamers of all ages, challenges the user to save an unfortunate group of fairy dwarves imprisoned within colored spheres. Row by row the spheres move down the screen and it's up to the player to destroy the spheres and free the dwarves by firing his or her spheres at two or more advancing spheres of the same color.

The game offers both an Arcade and an Adventure mode and delivers over 30 levels of gameplay.

See the studio's gameplay video.

Mobile developer Croquis has just released Castle Fantasy [link], a side-scrolling hack-'n'-slash platformer, through the App Store.

Castle Fantasy is something of a "2.25D" affair in that it consists mainly of 2D character and backdrop illustrations (more than 2000 of them, according to the developer) and is played on a 2D plane, but there is a sense of depth conveyed through varying platform heights and, at times, foreground parallax scrolling fields. But, more simply and to the point, it's a very lovely game that's well-illustrated and smoothly animated.

Gameplay involves moving your character through the game's levels — there are four chapters, each with seven stages — while collecting gems for power-ups, slashing enemies, and jumping from ledge to ledge. Some of the ghoulish enemies are much more difficult than others, with greater endurance and range weapons. The occasional boss enemy is encountered along the way, as well. At the medium difficulty setting, it's quite a challenging experience. Some of the challenge, however, comes from the game's controls…

Your character is controlled by way of onscreen buttons. Movement is handled via left / right buttons at the lower left (I find it best to treat these as a "slider") while jumps and attacks (both short- and long-range) are triggered by a button cluster at the lower right, with a sort-of fatality button bottom-center. In first playing the game, the controls feel a bit cluttered, but extended play does bring a good deal of familiarity which helps the situation. Still, when the action gets intense, I find myself occasionally attacking when I want to jump or failing to move in the desired direction. It's definitely not a deal breaker, and there's only so far a developer can go in the controls in a game like this on the iPhone, but it's a little frustrating. Also, it takes a little while to get accustomed to the ideal distance and pacing of short-range attacks in order to not get clobbered constantly while delivering your blows. Skill in this regard brings much more success.

Happily, those daunted by the above paragraph can give the game a try before reaching for the wallet, as there's a free, lite version available as well [App Store].

See the developer's gameplay video for a look at the action.

Our forum readers are highly enjoying the game, some calling it one of the best action platformers in the App Store. After the learning curve, there's definitely some intense action to be found in Castle Fantasy. We recommend everyone at least give the light version a try.

App Store Link: Castle Fantasy, $2.99, Castle Fantasy Lite, Free

We Rule is a kingdom building game, somewhat similar to the massively popular Facebook game Farmville. Here's what we had to say about the game from our hands-on preview at Macworld San Francisco:

The game map shows you your kingdom as well as the kingdom of your Plus+ contacts. Scrolling across the map shows you the relative size of everyone's kingdoms. The goal of the game is to build up your community as much as possible, but with the added twist that your own kingdom can be customized with a number of special cosmetic tweaks. These tweaks will make your kingdom truly unique and personalized.

The game consists of alternating between your daily activities of harvesting or otherwise managing your resources while building up new houses, farms, and businesses. Your kingdom will be bustling with activity from townspeople as it grows, though unlike God Finger, you don't actually have individual control of the inhabitants. …Read More.

The game is free to download and play and has been well received since its original Canadian launch.

App Store Link: We Rule, Free

In Blast Off, you control a tiny rocket ship blasting through space rescuing astronauts. Touching the screen tilts your ship in that direction and fires your rocket, usually sending you off that way. Your enemy in the game is gravity, and the game is over when you crash– Numerous celestial bodies are scattered across each level, each which have a different effect on your ships trajectory.

As you blast through space, you have to keep an eye on your air and fuel gauges. Air serves as the timer for the levels, and fuel is consumed as you touch the screen to let off rocket burns. Once you get a feel for how the ship performs in space, it won't take long for you to sling shot around planets and use gravity to your advantage to really only need to fire your rocket for minor course changes.

Two different game modes are included, endless mode where you need to rescue as many astronauts as possible while picking up power ups to refuel and refill your air supply. Classic mode consists of 45 levels with multiple difficulties where players must collect as many astronauts on screen as possible then make their way to the warpgate without running out of air or fuel. Both game modes are a lot of fun, although I've found myself preferring endless mode.

Online scores and achievements are tracked via OpenFeint, and Halfbrick has even released the game's soundtrack as a free download on their site. If you've had fun with these kinds of gravity puzzle games in the past, Blast Off is really worth a look.

App Store Link: Blast Off, 99¢

In many ways Aftermath is the zombie shooter I've been waiting for.

You find yourself walking the streets at night of a zombie infestation, trying to fight your way out of the city. It's dark and raining. The entire scene is dark with the exception of your flashlight. You move around frantically trying to take out the incoming zombies when a flash of lighting reveals a horde of them right behind you.

The mood of the game really is perfect. The lighting effects, 3d engine and sound come together to give Aftermath a great feel. Your character is controlled by two thumb pads, but not in the traditional dual-stick format. Left is movement while the right one lets you turn left/right. Meanwhile, firing at zombies is automatic when you point at them with your flashlight. While this may sound awkward, it works quite well and makes the game feel a bit more realistic and frantic as you must be facing your opponents to fire at them.

Another aspect of the game that really stood out was the large city map in which the levels take place. There are blind alleys, cars, and buildings. You need to navigate your way around parts of the city to make your way through the level goals. This is a refreshing change from other dual stick shooters such as Alive 4 Ever which have all taken place in small square-shaped arenas. In Aftermath, you really feel like you are getting lost in the city.

Check out the video for the gameplay:

The game, however, only comes with an 8 level story mode and a final survival mode, but is integrated with OpenFeint for high score achievements.

While there is some replay value in the existing story levels to improve your score (and, of course, the survival mode), the main criticism about the game is this relatively short level structure. The early levels can go by really quickly and leave you wanting for more.

Still, it's hard to find too much fault in the game at only $0.99 when other games launch with much less. If you're looking for an atmospheric zombie shooter, this one's an easy recommendation.

App Store Link: Aftermath, $0.99

Our time with ZombieSmash has laid to rest our doubts that the genre had wrung out all it could, as ZombieSmash not only looks gorgeous, in a cute Plants vs Zombies kind of way, but has a number of surprisingly original elements to diversify the tired castle defense gameplay too. For starters, enemies can attack from both sides of the house at once, putting to use the multi-touch features of the iPhone. Scripted level manipulation also gives the game a more tailored and refined experience, in one level for example the screen gradually zooms closer and closer on the house you are protecting, making it more difficult to respond to incoming attacks and upping the challenge. It gives a sense of purpose and individuality to each level that removes some of the monotony of seeing the same house over and over.

A castle defense game wouldn't be complete without a range of monsters to defend against, and ZombieSmash delivers abundantly in this respect. New monster types are regularly introduced, each with their own attack style and different means required to dispatch them. And by means we're talking about over 20 unique weapons and upgrades that are each controlled differently, from pull-the-pin grenades (which hilariously, you can smack the zombies around with before they explode) to screen-clearing giant boulders. Whilst there seems to be an underlying strategy to ZombieSmash in deciding where and when to use your special weapons, particularly as some weapons combine to do additional damage, as a castle defense game that incessant flicking-like-a-madman gameplay is unescapable, and is ultimately what turns people away from the genre. The developers have seemed to recognise this and address it somewhat, as a few levels focus solely on special weapons, blocking the ability to grab enemies altogether.

One of the high watermarks of our experience with ZombieSmash has been the "Finish Him" cam (a throwback to Mortal Kombat fatalities) where time freezes and you can bestow immeasurable pain on the last zombie of each level– all recorded in celluloid for you to seamlessly email to your friends, send to facebook or save them to your phone without leaving the game. To round out the socialisation aspects, ZombieSmash features Chillingo's Crystal platform, offering achievements and leaderboards for a variety of the game modes on offer.

ZombieSmash has 31 Campaign levels (with the choice of either Normal or Hard mode), an Endless Siege mode and a nifty Sandbox mode, where weapons and Zombies that you've met in the Campaign mode can get friendly in your very own creative/sadistic ways without the risk to your house. From what we've seen based on our own sessions with the Sandbox, and from posts coming in from our readers, there are some rather remarkable means of eliminating Zombies that may not seem apparent at first. There is also a comprehensive upgrade system in ZombieSmash, where stars collected from the other modes can be used to boost your arsenal and defenses, enabling you to hold out and dish out all the more. You'll need to really dig deep into the upgrade shop to face the Hard difficulty levels, as even Normal difficulty poses a substantial challenge in the mid to latter stages.

ZombieSmash has evidently received a lot of love from the developers, who have attempted to liven up the stale flicking gameplay that comes with most castle defense games. As a result, ZombieSmash really does stand head and shoulders above its competition.

Despite all this, we still aren't convinced it'll make converts out of those who avoid castle defense games, but may draw in those open to a different take on the genre. A rocking soundtrack by Chris Hülsbeck, of Giana Sisters fame, completes the package– a fitting encore for your hard day of Zombie culling.

If you haven't already, be sure to check out the Debut Trailer (which we've included above) for a look at the gameplay. Also, check out our discussion thread, which is brimming with many positive impressions from our readers.

App Store Link: ZombieSmash, $1.99.

The Hero is a largely understated title for a game that puts you squarely in the rubber shoes of a top-heavy, Mr. Incredible-esque crime fighter with a penchant for destruction derby and loop-the-loops. Our brave hero zooms in from space, taking it upon himself to fly around each gorgeously crafted city to complete a number of tasks (by ramming them with his head) to keep secure his charges (the fair citizens), whilst causing as little damage as possible to the surroundings itself.

Of course, asking our Hero to go about his duty of catching falling babies, putting out fires, culling down the army, killing giant insects or downsizing orbital laser-barraging satellites (to scrape but the surface of his repertoire) without the occasional high-five would just seem rude. If The Hero has started to sound absolutely insane, that's only because it is. That simple fact can also be credited with why collecting High Fives from the town's citizens is the fuel source for your three super powers — Freeze, Blast or Zap– each of which help cut down your foes when you're feeling overwhelmed.

And overwhelmed you will be, as though The Hero starts of at a very relaxed (almost boring) pace for the first 5 or so levels, those who stick with it are rewarded with a manic adventure that will test your digit reflexes. The Hero has two control options to direct his flight, a virtual analogue stick or a tilt option; your Hero handling much more like a bi-plane than a Batman. This may seem frustrating at first, as you attempt to wrest your Hero into pulling tight turns to little avail, until you realise that the controls more closely resemble games like MiniSquadron, requiring you to loop to turn around. You attack enemies by simply ramming them, assisted by a boost button or by letting loose with one of your superpowers, which are gradually unlocked in the Campaign mode.

The Hero measures your progress each level by your ever present Fame meter. If you fail to stop the incidents being brought to your attention or if you receive damage yourself, your fame will decrease. If your fame reaches zero before completing all the assigned tasks it's "Fame Over", and you have to restart the level, something you'll see quite regularly as The Hero is certainly no walkover. The Campaign levels pose their own individual challenges too, tied together in a very loose but very funny storyline. There are 15 Campaign levels to complete on both Easy and Hard difficulties. There is also a Survival mode with 4 increasingly large and challenging cities that are gradually unlocked, where your Hero faces all manner of obstacles to build up the best score possible.

It's hard not to recommend The Hero simply due to its terrific style and over the top humor. Whilst some may find the airplane-like handling of The Hero to be counter-intuitive and awkward, those open to the gameplay will undoubtedly enjoy cannonballing through an army of enemies, including a number of challenging boss archetypes too. The open-ended Survival mode will whet competitive appetites and potentially add many more hours to The Hero's already substantial content. Oh, and did we mention you get to fight Zombies?

Be sure to check out the gameplay trailer above for a further look at The Hero. Impressions from our discussion forums are flowing in thick and fast, and are overwhelmingly positive. And a heads up to you lucky 3GS owners, there's an easily overlooked option which switches on a 'high' 60-fps mode.

App Store Link: The Hero, $1.99.

One of the developers who took up the challenge was Owen Goss of Streaming Colour Studios. Owen labored through the night and came up with an interesting title called UpDown.  As Owen described the game,

UpDown is a puzzle game. To complete a level, all pieces must be raised or lowered to level 0. However, you can only raise or lower pieces in the patterns dictated by the brushes. Strategy and intuition are required to master this simple yet challenging game.

While graphically sparse, the game was maddeningly difficult. What Owen had come up with was such a challenging formula that, when we spoke with him about the title last year, he indicated that he was considering building the prototype into a more complete game and releasing it through the App Store.

At GDC 2010, I sat down with Owen and he showed me LandFormer, his upcoming puzzle game that is the evolution of UpDown. And trust me, it's still maddeningly difficult.

The included screenshots show rather clearly how the game has evolved. LandFormer presents a five-by-five game-world grid with five different terrain levels for each block. The goal is to alter the terrain such that all blocks form a flat plane (the blocks with the little villages on them). To do so, you must pick a brush along the side of the playfield, tap a block on the playfield at which to center the action, and carry out a two-finger swipe up or down to indicate the desired direction of change.

If that sounds easy to you — well — it's not. The effects of one move are layered upon the next (and upon the next, and so on…) in such a way that you can pretty quickly develop a dread sense of having painted yourself into a corner, in a manner of speaking. I was having difficulty with the easiest few levels and could feel a growing desire to send Owen's test device into the wall of the Marriott lobby. But, despite my own frustrations, Owen assures me that all of the levels in the game can indeed be completed.

To enable players to torture their friends, the sinister developer has included a level editor that allows for the creation of custom maps, built using the same brushes used for standard play (so that all levels will be solvable). User made levels can be shared with friends via a web-link system, where all the data needed to describe the level is present in the link's CGI variables.

Puzzle addicts who enjoy having their brain crushed will want to run, not walk, to the App Store and grab LandFormer when it makes its debut in April. The game will be a free download including about 10 tutorial-difficulty levels (which is what I was playing at GDC…) and the aforementioned level editor, with additional levels available as in-app purchases.

Having played my share of matching games, it takes something a little different to really capture my attention. What immediately stood out with Cubetrix 3D was the fast paced/arcade nature to the game – like Tetris on the later levels. The game is a row-matching game where your job is to clear the board as quickly as possible. To accomplish this, you can move a single block around the perimeter of the board and slide it in. The block that slides out can then be moved to a new position. It doesn't take long to figure out how to move the blocks to line up matches and combos. The high energy soundtrack adds to the experience.

Watch the developer video to see how it plays:

Beyond color block matches, the game also introduces a few other elements to the gameplay. Fixed blocks will prevent you from sliding blocks into certain rows, while the bomb elements add an even higher level of frantic rushing to the harder levels. Finally, some levels use colors and numbers that must be combined in sequential order to eliminate rows.

Here's a short hands on video showing normal and hard levels:

The hard level is crazy from the start, as bombs will randomly reshuffle the entire board in an instant.

Cubetrix 3D really sucked me in from the start. The game contains 20 Easy, 30 Normal, 30 Hard and 30 Puzzle levels. With fast paced gameplay and a great overall experience, I highly recommend it.

App Store Link: Cubetrix 3D, $2.99

Sailboat Championship is a clever game in which you must properly steer your boat in order to fully capture the wind in an effective way to propel yourself forward. While I'm no sailor, I've been told by those who having sailing experience, this is a great representation.

The full version of the game links to the free version as a training mode, so it's worth downloading both if you've never tried it before. The full version comes in at $0.99 contains 9 Pro stages, 2 Rescue missions, and 6 different boat types.

App Store Link: Sailboat Championship, Free, Sailboat Championship PRO, $0.99