The rules of Snow Rider 3D fit in one sentence: steer left and right and do not crash. What makes it hard is the pace. The slope starts gently, but after a minute obstacles come in tight clusters and you need to pick a path several objects ahead. Ramps along the way send you into the air, and a clean landing keeps your run alive.
Gifts are scattered across the hill. Collecting them lets you unlock new sleds and cosmetic items, which gives every run a small goal even when you are not chasing a high score. Runs are short, so it is easy to play one more.