Yeah, I had only realized later that I needed to include clearer UI to indicate the ability to switch between cars. I'm glad you were able to figure that out without having to read the game page instructions though. As for the difficulty ramp, I think you are right for a game jam format, it needs to be a little bit quicker to the action. In my playtesting, the real difficulty curve starts to hit hard around 5 minutes in and usually most games end around 10-15 minutes unless you get some OP item combination. Thanks again for playing and I'll think a bit harder on how difficulty should scale for this.