So, at first I haven’t playtested this game as intended. I didn’t realise that moving the mouse rotated the camera! Which made it really challenging, and really fun.
Then I tried it rotating the camera and it was still challenging, maybe a bit less, yet still fun.
THEN, for fun, I tried moving randomly the mouse at the beginning of the level and keeping the perspective locked that way for the whole level.
This is me playing upside down.
So, well, my advice is to try it yourselves and maybe add a modifier in the menu where you can randomize and lock the camera (within a certain range). You could also make a level in which the perspective changes in specific points, (like old Resident Evil games)! I’d really invest in that direction if I were you :D
I’d refine it working on this perspective thing and a couple more levels. Some more graphical polishing, and there you go, amazing game.