Hold the space bar to increase momentum on the ball. It will roll forward at an increasing speed. When it is released, it will start slowing down to a complete stop. This fixes the first version of the game where the square would just stop. You can also increase the momentum and Y Velocity of the ball using the sliders. Oh yeah, and there's an easter egg referencing Gravity and Momentum v1. Try to find it, Internet.
The updated version of Gravity and Momentum. ------------------------------------------------------------------------------------------------------- Scratch Wiki had the gravity script, and I made the momentum part. All of these incredible graphics were made by me.