Pixel Jump is a game where the goal is to jump on the platform for as long as possible and get the high score.
There are downloadable Windows builds for the PICO-8 and TIC-80 versions below, or you can get the .p8 cartridge image for PICO-8 from the PICO-8 page in the menu above.
Pixel Jump II (itch.io) is a remake of the game with many new features, including more characters and worlds to play in.