Loved the upgrade idea, it felt a bit too "grindy" tho with the amount of money won not really scaling that much with how fast you did.
I made it to 15 secondes with the bigest propulsor set up and the extra grippy wheels.
I kinda wanted to so how fast i could get but getting 45.000$ to upgrade it completly felt like it would have taken me too long.
Enjoyable and addictive, good job !