I also made a small boss rush type game but I have to echo the first comment, I found it difficult to understand how to deal with the first boss even after reading the instructions and the comments below. I encountered a bug a few times where the boss remains permanently damaged if you have the lightning hit direct from above but below its shadow. Once I understood that the lightning and the owl's shadow had to be overlapped for it to be damaged, I managed to have it hit twice. I do think you aren't afforded enough opportunity to have the lightning and the owl match up. I did enjoy the soundtrack and the visuals, I just think the gameplay needs to be balanced to be more fair in my opinion.