This is Paul '96, an installment to the first game.
Paul and his cyborg Grandpa live at the edge of town. One day Paul drank all the milk again. So Gpa sent him to Santiago's Shop to get more, and fight his way through gangbangers, bikers, and even dogs to get there. But it gets much worse on the way back....
There are also portals to the new.sfc world, if you've played that.
This is technically a demo, but all that's missing is a final level/boss. I've got family stuff at the moment, so that will come later. enjoy!