Wow! Blown away, so much polish in this thing. I love the little touches like how you used the full color palette to add a bit of anti-aliasing to your text and HUD. The damage and death VFX are great. Everything has great feedback, the sprite and tile work is top notch, even unfinished and dead end areas you took the time to spell out "THE END" or "WIP" to communicate to the player.
I'm only sad that there isn't more.