The game has 2 game modes. First one is some kind of "story mode". You are to upgrade your skills and get achievements.
Another mode is locked until you get a certain achievement. After that you can play a really bright and colorful game. This time your goal is to run as far as possible.
Please, do not skip the intro. It's really brief.
You can't jump on the snow. Sorry for missing this comment in the final release.