@Iluvtrolls I think this is intended. Circles fit into square holes, but not vice versa. So you have to make sure not putting a circle in a square hole, when you need all circles for circle holes
I really liked this game! Nice graphics, music could be a bit smoother, good controls, interesting level design, gets trickier over time, but never frustrating. Good job! 5/5
The "Level Failed" screen should appear after the monster stops moving and not after a certain amount of time after the last cut. At some levels you can clearly see that the monster would touch the spikes after a while. Beside of this: Very nicely done game. Congrats! 4/5
@SilenGames: There is definitely a save game problem. I'm on Ubuntu 11.04 and use Firefox 5. It happened two times, that the game crashed. After a reload, my progress is reset to level one, no skills, no money, no upgrades. Just the achievements remain on the correct amount.
Sorry about that. I'll try to fix it and update the game. edit: Try to reload the entire page (F5 or Ctrl+R)