Games this simple do NOT need a tutorial, and NO tutorial should be inescapable. But it does need a mute button. Also mouse control.
It's OK. It would be better if you had any idea at all how many dungeons there are to go in a level.
The rat king level is a PITA, but mostly the game is fun
It wads good until the impossible level. The stupidest most annoying thing any game developer can do is take away the weapons.