If you're looking to trade some pocket change for a few games that you could find yourself spending entirely too much time playing this weekend, here are three that are worth checking out:
Starball, 99¢ - A very simple tilt controlled game where you move a green ball around collecting stars. With each star you collect a red bouncing ball is spawned that must be avoided, and gameplay is spiced up with a series of power-ups which are all detailed in the above video. Starball comes loaded with OpenFeint for online leaderboards with separate listings for each of the game's three difficulty settings.
Boom It Up!, 99¢ - A curiously casual title from Gamevil. In Boom It Up! you tap the screen to fire a cannon ball skyward, and as you get higher and higher you need to time your launches with even more pinpoint accuracy to avoid all kinds of obstacles. I'm not entirely sold on the gameplay, but it is interesting to see the casual side of Gamevil, a company which historically has released epic RPG's and other games with insane levels of depth. Boom It Up also has global leaderboards as well as the ability to brag to your friends on Facebook about how good you are at an iPhone game.
Arachnadoodle, 99¢ - This game is like the developers took Peggle and Spider: The Secret of Bryce Manor, threw them under a Slap-Chop, slapped it a couple times, and put the absolutely fantastic results up on the App Store. You fling a spider up through a set of pegs to form a web within a certain number of jumps. There's more to it than that though, when you're building your web you need to try to reinforce it as much as possible by connecting to pegs you may have already covered. At the end of each level a swarm of flies comes through and each fly that gets caught adds to your bonus points. If that wasn't enough, it also has OpenFeint, achievements, and all kinds of marvelous slow motion effects and text popups when you're doing well.