Thank you for those kind words and feedbakc :D
Actually, some of what you see as visual bugs might have been left there with intention ! The glitched elements that stays when you change screen, the character that stays too...I actually saw that, and it's easy to solve within unity, but I felt like it added something to the game :) (and the glitched sprites stay on bc it allows the player to really see what they are doing).
But you're wright, some of them aren't intended aha !
Thanks again !