It took a second to figure it out, but I thought it was good. It's really good when someone can pick up your game and you don't have to explain how to play, and people can figure it out.
The main thing would be controls. As long as players know it is the arrow keys or WASD then they can press them on level 1 - 3 and see what happens.
agree! ya your game is awesome and i quickly picked it up =]