Tap on the Launchie (The Ball) and drag! The further you drag, the harder you launch! Release the let your ball launch! I'm giving up this job of making instructions- where is my paycheck?!
Yes, I am that same person who made Launchies on Tynker. Now, thanks to my good friend Irsy, your ball can go brrrrr. Thanks, Irsy- very cool! Note that there isn't any wall collision other than the built-in wall detection.