Yup I made the model! Thank you it's my pride and joy and also the reason I barely had enough time for anything else :P
I wrote the enemy spawning right before the deadline so I didn't take the time to stop and consider the ramifications of 10 second waves spawning Wave Number * 10 enemies. Getting 3.8 minutes in like you did would means enemies were spawning at a rate of 23 enemies per second... Whoops :(
I'll definitely release a patched version with bug fixes, longer wave cooldowns, and enemy code optimizations as soon as it's allowed by the jam
The grey screen is supposed to be Mousey going all chaos-y due to the loss of her bells unleashing her power and obliterating all the enemies around her but I forgot to mention that in the prologue. Fun fact originally it was a quick fade to white but that meant accidentally flashbanging the player lol. Oh and you are spot on I took various snippets from Devil and mashed them up!
Next time I'll work with a programmer/team for sure, I joined the jam late so I assumed teams were sorted out and there'd be no place for me