Hi! Love the concept, just shows you don't need fancy graphics for an enjoyable game :) That being said, I do think it's too easy to avoid the enemies. Also, on 3/4 levels the floor exit was right next to where I spawned. You should implement a distance check when generating the floor exit and make it 'X' distance from the player, either that or give them a reason to want to explore. Maybe add some extra points of interest in the levels, or some loot to grab?
It's a great attempt, especially since you didn't quite manage to finish it!