Oh man, I agree on animating dances. The thriller dance took forever for me, but I was laughing the entire time so it was still pretty great. I actually expected some awesome dances when I saw your entry. And its not just the character art that really impresses me. The detail you put into the background of rooms is great. Loved the bathroom haha.
I'm definitely not skilled enough to build my own engine so more props for that. But its been really cool seeing yours evolve. I feel like movement and collisions have definitely improved each time.