For a first jam game, this is pretty impressive! You've focused on core functionality first rather than extra mechanics or side-gameplay, and I think that shows the kind of project management skills that are needed to successfully navigate a jam!
I think that the reverse controls for driving the car might be backwards? Pressing down just makes me drive forward slowly, which makes me think that there's probably a missing minus sign somewhere.
With some small changes, I think what's here could be polished up quite a bit, but part of successfully navigating game jams is knowing when the right time to step back is. I think you should feel proud of what you've accomplished here!
Hope you had a positive experience using Godot, and thanks for doing a Linux build :)