The objective is to collect as many toilet paper rolls as you can before you run out of time. You need to use your cart to collect and deliver it to your truck, which is parked outside. That's it. But doing it is challenging because of the other customer ai's who will be blocking your way and will be colliding with you. So you need to avoid them or attack them with the throwable items which can be collected by moving in between selves. It may sound simple, but from the day I have made this, I have never crossed score above 100. I hope you give my game a try. I know I haven't given proper instruction in UI, as I didn't have time. But the objective is simple just try to collect as much as you can. And if you are gonna give it a try, and if you cross 100, please send me a snapshot of the score. I must say, it was really difficult for me to cross 100 within time. It seems possible as the cart can hold max up to 50, but as you move it becomes difficult to handle.
And please go through "how to play" to understand the premise.