Unfortunately it looks like Godot is having issues with rendering on AMD-based computers :( I'll try to come back later and see if I can fix it, but if not, I wish you the best of luck with the jam! Your game looks fantastic and I'd love to play it if I can fix this.
No worries, thank you for trying! There seems to be a similar issue coming up with others, so thank you for letting us know, our dev team's trying to figure it out :,)
