This game is really cool!
I love the idea and implementation both. I have only played maybe 2 other turn based roguelike games before and this is already one of my faves. DoomRL is probably my all time fave turn based roguelike.
I hope that you continue to work on this and get some more tiles especially instead of the test64 ones.
The only thing I didn't like a lot so far is you seem to spend a lot of time waiting on the enemies to move; I feel like that could probably be sped up some, esp when they are nowhere near the player.
Great entry!