Swipe down as fast as you can to pull all the paper off the the toilet roll. The better you pull, the faster it goes and the more coins you earn. Coins can be spent in the shop to buy different toilet paper designs.
Another simple, but strangely compelling game from the NS Brotherhood Team. It works especially well on mobile, where swiping is a lot easier. Now, just one more go before I can unlock the Sushi themed paper.