Managed to get to floor 3 before a curse of reload speed got me. I was getting to the stairs with like 5 seconds to go each time so it felt pretty exciting. Showing the enemy spawns is a good idea because it stops the player getting annoyed if an enemy spawns where they are standing and also gives you a chance to kill the enemy before they have a chance to attack.
Art style is very nice too, just wish the enemies and floor weren't so similarly coloured so I could see them better.