This game is really well designed, and I think you have put in a lot of effort to make it work. I really like the design of the ability of earth which can make the character stick on the wall and elongate it. Also, I think the plot in the game is pretty attractive. It is like the old school hero story in which the hero avenges the bad guy and takes his abilities back.
However, I think there are many details that could be polished such as the UI and some scene setting. For example, the health bar and mana bar for the character are kind of inconsistent with other UI. You may give him a transparent background like what you did for spells. But, generally, the theme and plot are very interesting.