Pretty fun, although I'm not sure if it's just me, but I died once and then my exact next game I spawned in the bosses chamber with no escape!
As people below have stated, I stood no chance with the boss haha.
Also, I don't know what was happening but I don't think I managed to kill a single rat, the rats must have OP health.
Even though I never vanquished any of the enemies, I must say I enjoyed the game and gave myself a heart attack when I spawned in the bosses chamber.
Very cute visuals and even though the boss gave me a fright, he was also kinda adorable once I got to know him :)
Good job!