Hey I've tried the Mac build. Gotta say, compiling the mac version was worth the hustle. The tutorials is a big plus from me and I think it's greatly underappreciated because it was simple, yet communicated what's necessary effectively. The art work was pretty good and the music is well done.
Edit: Forgot to mention, the enemy AI in this game is amazing.
Some problems that I have is when you play the game in Mac(which will in default be fullscreen), then the game stops responding when you die. This can be fixed when you play in windowed mode. Also, the feedback sound for the player when he takes damage is extremely faint. And you don't notice it when you're in the heat of the moment. So make the feedback more audible or make the damage more visible.