Good potential. I think the normal force is a bit high on the steep slopes and theres too much elasticity in the tire.
Upgrades like bounce, speed, acceleration could add strategy to a game like this.
a 5hr comedy central marathon wouldn't have taken as long. Needs a pause or atleast pause between levels. also don't make time survives on levels, make it 500 or 1000 kills. Even 2000 kills i would have been done faster.
I think those little bean fukkers are invincible. I had one chase me for nearly 30seconds and killed me. I had full hp, shooting at it with auto shotty.