Hey. Its preety good. Its getting chaotic at floor 20.
As the other guy said, i am also a bit confused with the control at the start. It would be nice to put the controls instruction at the start of the game.
Well. I was surrounded by two fire demons and one bomber with 1 hp left on me, so good times. :)
The difficulty really ramps up when there are three enemies in the room. There is little space to escape, so taking damage is inevitable. Putting good upgrades before difficulty jump might gives the player better chances of cracking harder levels.