Hey there! The concept isn't bad, i could imagine this as a mobile game if it was more unique! The graphics need improvement though, did you make them yourself or are these from the asset store? Find a really unique mechanic and only focus on that, maybe make a game that's only about the timing and not about controlling the car with arrow keys, and i think it will suceed then!
I hope the feedback helped you a bit, and it would be nice if you could check out our submission too, thank you! :)