Hopefully people won't abuse it if it gets implemented...
For most intents and purposes regarding GBA games, I'd recommend Butano. It's simple to use with some C++ knowledge, and there are already plenty of examples you can check and compile in order to see how to do something.
But if you want to go straight to the more advanced stuff that Butano can't do, there's Meson-GBA, a toolkit that supports many libraries like Libtonc and SDK-Seven.
I technically have a job with Something Nerdy Studios, but they haven't given me work to do in a year.
I also do volunteer work everyday.
I have never played Firetrap, but all I have come up so far for the gameplay is punching enemies and climbing buildings. That's it.
I am an artist, but I'm also a musician, but I'm also a newbie coder.
For this jam, I'm looking for a game/level designer to partner up with, and/or a coder with much more experience on the GBA than I currently have.
My music work is currently in my ModArchive: https://modarchive.org/index.php?request=view_artist_modules&query=91197
My art work does not currently have a host, but here's what the game currently looks like:
I'm Nikku4211.
I've played several retro video game systems through hand-me-downs from my parents and older brother. This includes, GB, GBC, GBA, DS, SNES, NES, Mega Drive, Dreamcast, PS2, PS1, and early CD-ROM Windows games.
I started programming in QBASIC on DOSBox back in 2013 when I was 10. I then started learning a bit of 65816 assembly, and then started learning HTML, CSS, and Javascript, and then learned more 65816 assembly, and then learned C. I later took a high school course on Python, and a college course on more Python as well as C++ before dropping out of college. I then brushed up on some 2A03 assembly (which landed me an actual online job with Something Nerdy Studios) and now I'm getting into coding on the GBA for the first time.
I've tried a bit of Butano, and I am currently trying SDK-Seven.
I also draw pixel art and make tracker music. I'm really interested in using the GBA like a 6-channel system, like a GB but with 2 extra PCM channels, I personally prefer that over softmixing.