I love the game. Tower Defense is one of my favorite game genres and this is an insanely interesting riff on the theme. I also can not tell you how gratifying the mouse mode is; my hands tremble sometimes and the mouse makes this something I can play even when I can't reliably get my fingers to do what I want.
I've run into a bug on three play-throughs now. One or more minions froze on the map rather than dying not letting the wave complete. It happened with different minion types and on different floors so I don't know how helpful this will be.