The Game Concept is pretty cool! I think you could still improve so much, for example I would have liked a health bar for the enemies aswell. Nevertheless it's a solid game with cool music, artwork and great gameplay! :)
Thanks! Yes at one point the enemies had health bars, but it was a huge mess because of how Unity handles sprite masks and UI... That was basically the only reason I didn't include them :P Thanks for the feedback though! :)
