Hello jammerinos!
I know we often get a good number of submissions that use TIC-80, which is a retro-styled “fantasy console” for building games with harsh technical constraints around resolution and limited sprite sheet size. It makes it easy to export games to play in the browser, and anyone who plays your game can “peek behind the curtain” to see the code and art and even make changes to it live without recompiling.
TIC-80 supports Fennel out of the box, but the current release has an issue where the stack traces reflect line numbers in the compiled output rather than the original source code lines.
I have a fix for that bug here: https://github.com/nesbox/TIC-80/pull/2705
So if you plan to use TIC-80 for the jam, I highly recommend building from that branch, or from main once it gets merged, since it really makes a big difference having the line numbers when debugging.