Interesting game - and pretty challenging too. Especially the ones without black blocks, since they gave often very few clues. :)
I would've liked a better undo button though (remembering more moves), or a way to turn tiles grey again, as I found myself often painting tiles I didn't want to paint.
A nice DTD game: fun theme, good looks. It definitely looks distinct with this point of view.
Building multiple towers is slow though - a hotkey for every tower would be nice, or staying in build mode after building a tower.
Despite that, I enjoyed the game, although short-lived since it's not too challenging once you're a bit familiar with TD games. I ended up with 1.4M cash, on insane difficulty...
 "3D Logic"){kind=icon}
 "Revenge of the Stick"){kind=icon}