Heavy Shreddin' is a relatively obscure snowboarding game with five different events: Downhill, Slalom, Halfpipe, Moguls, and Backwoods. Though the screen scrolls at a set speed, there are several speed altering techniques that can be used to obtain a faster time.

Lightmopp saves about 16 seconds off the previous run through very tight and precise optimizations. For further details, you can read the author's notes.