I don't understand what this game wants from me.
The game is called Crazy Car. I'm told to hit as much stuff as possible. So how come when I try to go crazy and run into everything at top speed, I immediately fail?
When designing a game, you need to be conscious of what you think the ideal most fun strategy would be. Then, you have to design everything to guide players toward this strategy. If the most fun strategy is too hard, or there's an obvious easier strategy, everyone will just take the easy way out and miss the intended playing experience.
For this game, the intended strategy is to run everything over and get out of control. But the obstacles are preventing people from doing that. So it's simple! Remove the obstacles. Games don't need to have fail states. I think this game would be much better without them.
Anyways, the visuals are pretty good. The low poly art style is kind of overdone nowadays, but it's a game jam, so it makes sense. I don't know a whole lot about sound design, but I can tell you here it definitely could be better. Especially impacts could be way more... well, impactful, if you had better sound effects.
I also think the theme feels tacked on. It seems like you just made a regular car game and then thought of a way of connecting it to the theme afterwards. That might not be true, but that's how it feels to me.