I'm not sure if the developer thought the puzzles were harder then they actually are, or if they intentionally made the game very easy, but either way the difficulty level is too low. I still like the game and I'm not unhappy with the purchase, even at full price, as it has been a very enjoyable experience, but I really hope they will release a new level pack with a faster ramp up in difficulty, and with much harder puzzles by the end. I'm on level 50 of the game (haven't started level 50 yet) and this one at first glance looks harder, but really there were probably only 2 or 3 levels up to this point that took me more then a few minutes to figure out. The game is fun, mind you, and I still recommend it, but the challenge is definitely a bit lacking. If I recall correctly, Chip's Challenge on the Atari Lynx had 100 levels or some such larger number, the difficulty ramped up much faster and the levels became very challenging. I don't think I ever finished that game, though that was in part due to the use of passwords instead of a game save - argh!