Really good concept, highly readable and with tight controls!
The game is addictive, interesting, and the idea of placing the turrets for each wave is really original.
The tutorial/main menu is a great element, as well as the visuals being 2D/3D.
My only complaints are that it's a shame there is only 3 wave, especially considering you had all the elements to make it random each X points (I suppose), and the music, (as the quick loop, in all honesty, can get quickly annoying).
Amazing jam entry!