I think this is an early demo showing the core mechanics of a very promising game. I had much fun playing the first two levels.
Here are some suggestions:
I liked the clean graphics but the first dungeons appear a little empty. Maybe you can add some more atmospheric elements.
I would prefer if you can attack the enemys with the mouse. I played as an archer and as usual i tried attacking the enemys with a mouse click. The only effect was that I walked towards the enemy which isn't very healthy as an archer.
Didn't notice background music. Maybe you can add some or turn it louder.
I hope this helps a bit. All the best for further development!