Would be cool if all those achievements had medals! I like the game idea, both different and addicting, with a good difficulty addition for each level. Didn't realize I could actually move around till I started wondering what good all those upgrades were when they couldn't be reached... but seems you can play the game standing still as well. :)
A few things I noticed: the white text doesn't seem as clear on the orange as on the other menu elements, and the calm music doesn't really seem to fit in with a fast-paced game. Overall though, good fun!
-cd-