Okay, first impressions: The balance has clearly in favour for the player. I was able to complete 3 floors until I died. I think the difficulty of now os what the game should stay at.
It's fair for the average casual gamer while still being challenging.
The consumable powers are really neat and helped me to defeat some bosses (0 energy costs for 10 seconds? Geeeeet dunked on!). They can give you just the edge you need to defeat some of the nastier bosses.
I'm pretty positive the game can become something great.