Thanks for the feedback!
I don't get what you meant about the text in the beginning: aside from the the options and the restart button there's only 6 keys to memorize, 4 if you don't use brakes. Maybe I could have presented the text better, with little diagrams and color coded? In any case, I do believe the best solution to everyone's issue learning the controls would have been a tutorial map or area designed to let the player mess around and learn before the race.
I decided to make every asset myself and music is still sadly outside my list of skills for now, but having a song could have been great, I agree.
Quick tip : When commenting on someone's Jam entry you can do so on the voting page so that your own entry gets displayed under your comment. That saves everyone time looking for the game.