Thanks for playing! Yeah I actually wanted add a third enemy but just didn't have the bandwidth. The tilt was something I added on Wednesday as part of polish. It's crazy how something that was pretty simple to add enhanced the user experience so much!
I can't take credit for the shaders. I used and modified ones from here https://github.com/MenacingMecha/godot-psx-style-demo
Them along with the low poly are a great combo.
Thanks again for the kind words