If you like this, I made a more recent game you might also enjoy: https://scratch.mit.edu/projects/358934500/ Left & Right arrow keys to move left & right. Up arrow to jump. Press space to kick {you kick backwards} Click & hold to use magic on things with a violet "M". Since a lot of people have had trouble defeating the unithorn, listen carefully: click & hold on it until it turns black. Once that happens, let go of the mouse immediately & kick it as fast as you can. As long as you're touching the unithorn when you do this, it should die in a puff of smoke.
