This is lots of fun. Graphics, gameplay, controls; all great. I like that the enemies are randomly generated in each room. Stops it from being too repetitive.
A couple of issues:
1) Cannot skip cutscenes. They get a bit annoying after a while
2) Slime (on clearing a room, it would be preferable if it disappeared quicker.)
3) Money (Again on clearing a room perhaps it should auto pickup?)
4) The third boss seems easier than the second (edit: it was only on the second complete that the third boss spawned spiderlings.)
5) Replaying and completeing normal after completing hard freezes the game.