Very nice! The environment was beautiful as you climb the mountain, and it was satisfying to figure out how to control the car well. I loved realizing the sun was rising and night was ending. I'm also always a sucker for a good song while doing anything, including driving. :D
Some people mentioned optimizing, one of the quickest optimizations is to go through all the texture files and raise the LOD bias so that the game just doesn't pack the high, 4k version at all. Especially in a speedy racing game, no one will notice if all the plants are at 1/8th the resolution, but they will notice not downloading hundreds of mb of files for a jam.