Overall a very solid game! I had some trouble with the stairs. A bit more grip on the wheel would've helped, so that the stairs don't require precise jumping (in case you get stuck on one). Using the market as a timer/score combination was a nice idea and the art style is very cute
IMO the mines shouldn't push you backwards but outward from the center of the mines. That way they could be used as an additional mechanic, costing you market value for jumps.