I was really confused playing this. Some of the rooms where you try to avoid projectiles are almost impossible to get out of without taking multiple hits. the boss room with the ghost is where I stopped because I had nothing to beat him with and when I tried going back the game softlocked. Love the artstyle. Music was good, but some of the sounds in the music didn't sound like they could be made on a gameboy.
Thanks for your feedback :) It's difficult to measure the difficulty when you are making a game, so I take good care of your comment ! I 've made some changes (for example the projectiles you create are now harmless for you) and bug fixing (the rooms transitions,...). You can find the new version here if you want to try :)