This is so good man!
I played and beat the first Realm, got to level 5, upgraded my character and beat that damned Lumberjack! 

My Thoughts and Feedback:

• The leveling/Inventory system feels great and all I really need is some place to sell of my old un-needed gear (And a Place to Spend my Money).  I really liked this part of the game.  Very well done.
• The combat is good and rewarding.  I did feel I was moving a little slow, yet it seemed pretty balanced for the speed of the enemies.  I would get my cursor lost when there was a lot going on.  A cross-hair or Pointer Graphic would be sweet !
• The Skills - So Great!  Makes combat really fun a customizable.  I look forward to opening more of these as I am only level 5 (and there are 3 more classes to play).
• The Art - I love it!  Perfect and simple and the little animation added give it a cool feeling.  The enemies are great!
• The Sound - For some reason I have no sound?  I logged a comment in the Bug Section of this discussion board.  Not sure if this is expected in the current build.

OVERALL:

I really like this game and think it has great potential.  Of course there is more balancing and Dev work that I know you are working on.  All-in-All you have a great start to something awesome here!  I will continue to play and give feedback when needed.  See you on Twitter ;)