More
Add more stuff like cars that shoot back at you and make cannon actually do damage and more guns like flamethrower and rocket launcher. Look what fast lane road to revenge did to you. Add more classes like heavy light, or medium which you can choose 1 gun from that class. Add more colors and more trucks and cars and helpers that heal you or do some damage or special moves which you have to buy to get them and special moves like poison damage or 2x damage or regenerate health and one that shoots a super fist and more kinds of bosses and add rare stuff like turrets on the side or on rocks and a power up that makes you invincible for 5 seconds.