Thanks so much for playing and reviewing!
I appreciate the tip about Audacity. Glad you were amused by the voiceovers; a lot of people commented on those. I actually recorded them at the absolute last minute.
I'll work on the difficulty curve. I end up playing my own game so much that I get really good at it, so I lose sight of the challenge level.
In terms of the controls, the game really wasn't designed for the mouse. My intention was that the dominant hand would rest on the keys I (Swing Sword), J (Berserk Charge), K (Shell of Courage), and L (Torrent of Flame), which are clustered together on the keyboard. That leaves the non-dominant hand on WASD (if you're right handed) or the arrow keys (if you're left handed). In retrospect, I probably should have turned off the mouse attack option entirely, because most players don't have three hands.
The UI interfering with the real estate was something that I wrestled with. At certain points in development I mostly hid it (except for the heart/scar icons), but then it's almost impossible to remember which abilities are unlocked (and you can't keep track of where the cooldown is). I need a hard think about this one.
Lastly--I really enjoyed watching you play. Your verbal comments were very helpful, but in addition to that, actually watching a person play your game is incredibly valuable feedback in itself. Cheers.