What I’ve learned from previous 48hour jams, keep the scope small, really small.
It’s better to deliver something small, than have nothing or something that does not work or is not polished.
If you want to prepare, test your pipeline. Create something, build and deploy to itch.io as draft. Especially if you’re planning on doing a Web export, test that with different lighting options. I.e. Godot provides quite different results between Windows export and Web exports.
Test that part so that does not cause stress.