Would have been better if you spent a bit more time blending (as you did w/the chest w/the posts) and if the directional hands actually worked instead of some small square or circle sometimes in the center of them, sometimes off a bit.
The interface is very tight - especially the lead in/out. For me, I just wish the beginning of the level gave you time to strategize/place units before you get a wave, although it's somewhat challenging having to hurry. Although it's nice to have power-ups, I find myself using either money or time most often, so maybe allowing a couple of seconds more in between waves would be nice, although I could be wrong. Really nice work.