This was great!
I like that you can both shoot and deal contact damage. I got to 7km, and turned it off there, didn't feel like it got any harder.
some details:
- would have liked to run over the crops so the graphic changed.
- I wanted to be able to shoot the cars before the enemies get out so you get a combo bonus.
- I saved up a lot of ammo, so it would have been great if the extra added a score bonus or something similar.