This is awesome, really cool concept and aesthetic. I had the game hang at the end of day 9 but it may have been a hardware hiccup on my end.
Super minor, but I noticed one of the options screen's rotation depends on the angle you're looking, but it's only the last screen:
Thought you'd be interested in that :D
Awesome work though, I love the shading effects. I've tried to work with Unreal Engine a bit in my free time, one thing I couldn't nail yet was perfect black outlines on low-poly characters. It's a really cool look you've achieved.