With the new update, realistic physics have been added to the traditional bowling mode. You can now put spin on the ball to throw a curve down the lane, and you can adjust the spin sensitivity to increase/decrease the effect. I've also added oil patterns and a toggle to show them on the lane if desired. There are 2 oil patterns so far, with more to come.
Please let me know if you think the physics are off at all and I will continue to make adjustments until they are as realistic as possible. Have fun!