Interesting...
The game mechanic in this is really cool! I didn't love the way the platforming was also integrated into the mouse clicks, though. I think a separate button like space would have been better for the jumping. I can see where there's a conflict since the character jumps automatically to hit enemies, and it worked alright so I guess it wasn't too big a deal. Maybe if the jumps weren't so floaty it would have felt more solid.
Overall, it was pretty grindy, and I felt like the leveling up didn't do much. I used "power" and was fully leveled about halfway through. There wasn't much of a story, and the graphics were just okay to me: it was somewhat difficult to navigate because I had no idea where the ground was, and the characters were over-detailed for their size. Also, the screaming sound effect was really annoying.
Honestly, the game design was just mediocre at best, but the mechanic was so fun to tool around with it really didn't matter; I still had a lot of fun.