As an ui-prototype it is fine, but in its current form there is little reason to use any other skill than the hat-skill, because it does the most damage as far as I can tell. In a one-on-one combat to find a good use for a defend-skill there has to be some kind of indicator that a strong attack is coming. As long as the enemy uses his attacks at random you are probably better of just trying to out-damage him. Strong skills could need a cooldown, that you don't spam them and ignore all others. The hat-switching seems interesting when more types of enemies are available.
The art has a raw stlye that is charming. The TV-head... moderator? looked cool too. It has promise, but it needs more work ;)