In this game, avoid the balls falling from the sky, which get faster and more abundant over time! If you get hit, you lose a life, and at 0, you lose. If you survive long enough, you'll start regaining lives, and a special type of ball falls...
In the Sandbox Settings, you can enable Sandbox Mode, which allows you to change certain game variables such as Player Speed and the multipliers for difficulty ramp speed.
Your best time will show in the menu, best times for Classic and Sandbox are separate. If a run is a new best, it will display while playing.