Hey, I've been mainly lurking for the past three months but now I have my first small game to present. It's still a Beta version, but there are currently no known issues and it runs well on the hardware, and on the emulator as well.
The game is written in C pretty much from the ground up, making some minimal use of libc and libgba, but mainly just by bit-proding (I've put in a couple years writing microcontroller code for a living, so it comes pretty naturally at this point, or at least one the rust was dusted off that part of my brain). There are three levels, each somewhat more difficult than the previous.