Yeah, I think you're right.
I feel it would be cheating to change the game after the deadline, so I'll keep it in mind for future jam projects.
The way I've made all my menus, I had to build up the UI system from scratch as I wanted it to be tile based like the rest of the game. It was part of my goal to make a navigable menu that allows you to start, restart, quit, as well as view controls, but I didn't get around to it in time.
I hoped for a game jam it'd just be a minor thing, especially because of the buttons on the gameboy itself, but I'll definitely keep it in mind for next time :-)
I had a blast, and learned lot of new tricks. As my first solo gam, it's been a great way to challenge myself and learn something new in areas I've never spent time before (especially graphics and UI).
So please, if you have any more feedback, feel free to dump it on me :-) It's the only way you know how to improve and do better next time.