If the shaman has the "Clean Mouse" skill, I think they go to mouse heaven and get revived at the next round. If the shaman doesn't they go thumping into a bath pool and the mice in the hole have to get them back up to do the next round.

the mouse IS the bubble, you see that white line on the bubble, that's their eye to still see the mice trying to get the cheese

hell ofc

I hope once enough mice become bubbles the idiot who used the bubble skill gets lynched.

They go to the bubble factory, where the bubbles get manufactured into shampoo! So whenever you take a bath, know that you are scrubbing mice against your head!

hell if there bad mice or heaven if there good mice

It's actually a "game" so, usually if someone suddenly disappear [like when they log out] it will look kind of bad, so instead they turn to bubbles. It's a virtual "Endless game" since you have to play the next "level" too! It's actually where they fall is a bottomless pit. Just for a better animation and an interesting game-play, After you die, it's like you have got eliminated or disqualified from the game. Hope this helps :)

they vanish forever

mouse hell