Very nice game, I like the concept and puzzle platformer aspects. The fireball slowed down its horizontal movement when jumping which made it a bit hard to control. I also got locked in place when I dragged a block to my current position.
Thak you for the feed back! :D I will check the browser versión that is having some trubles. :c If you can the Desktop versión is more stable and is available for Linux and Windows. Thank you for playing the game :3!