Sorry for answering so late, I'm not really active on this site.
I played for 30-60mins before I had to go to bed, I know I got past the first boss at least. I'll probably try it out again soon now that I'm not so busy with work.
I would like to do something similar to this genre some day so it's really inspiring to me that you managed to do all this by yourself. I've been playing around with unity for a year soon so I'm starting to get a hang of programming part but the art part seems really daunting to me, as someone who's never really been into art before. Do you have any tips on how to get started? I thought your art looked really great, how long have you been practicing pixel art?