Well that error solidifies the fact that I shouldn't be allowed to touch shaders.
I'm sorry for all the issues. I can't update the game now, but I'll make sure to keep all of this in mind for a post-jam revision of sorts
EDIT: I looked around and apparently this fixes the shader issue? https://www.microsoft.com/en-us/download/details.aspx?id=35&44F86079-8679-400C-BFF2-9CA5F2BCBDFC=1
Let me know if it works out