Instead of deleting the old mimic with entity:Kill(), and turning it invisible so you can't see it, the mod now uses entity:Remove().
This basically means that the code is slightly tidier, and very, very slightly more efficient.

Instead of having 100 hitpoints on every floor, mimics now have 50 on Basement 1, gradually increasing to 330 on the chest/darkroom.

The mimics are supposed to attack when the player did damage to it or got too close. I made the radius too big, so people thought it just attacked as soon as it spawned. I have decreased the radius, so that players can choose when they want to iniiate the fight.