Finished!
Collapsed last night after finishing my compo entry so I forgot to make a blog post.
I made a 3D puzzle game where you control multiple characters at once to position them correctly in order to proceed, and in some cases you need to kill/sacrifice one or more. Here's a screenshot:

I found that on the first day I ended up wasting a lot of time getting the look right. I was trying to go for the low-res PS1 look (think devil daggers) with lots of 64x64 textures made in Tilemancer, and some custom shaders.
I ended up hating how that looked and went with an extremely simple minimal style with emissive elements. I think it ended up looking a bit better and was way less work.
Also, this was the first time I didn't use SFXR for all my sound effects. I was tired of everything always sounding 8bit and felt it didn't match the visual style at all. So I tried using various VSTs in Ableton Live to generate sound effects instead.