(L 1 = 1 dmg) , (L 5 = 5 dmg), ect.
the L 11 will always be in a corner
purple L 1 will always be on the edge, surrounded by 5 purple L 8
L 5 cat will be surrounded by 4 L 1 mice, when killed it will reveal all mice
I recommend not opening up chests with a question mark near them, if a number next to a chest is >10 it may be a mimic
the edge is pretty safe to make a guess if you have no better option IMO
level up before grabbing any heath scrolls
keep walls or mice around to help bring you to 0 hp
see if you can level up by emptying your health bar, if you need more XP than have health, you might want to make a guess if you have no scrolls,
if you have any more questions I'll try to answer them, I've only played for 12 mins