Great entry.
Had a lot of fun with this one, I kept playing till I maxed everyone out but had to stop eventually cause I wasn't sure if there was an end.
The rng factor works pretty well for the purposes of the wild card theme but I think being able to choose which vehicles you use would allow more strategy, some runs without anyone who stuns or heals felt like a wash. The golden combo is having the road roller and the water tank at the same time.
Nice work