Thanks for your comments. I'm taking note of all suggestions for a future release after the Jam is over.
I made the game in about a week, with gbdk using only C with no prior experience in programming GB games. I made it just for the pleasure of doing so. I didn't even know about the Jam when I finished the game. I posted the finished game on a forum, and someone suggested I could enter the Jam since I made the whole thing within the dates. So here it is!
Thanks again for your support!