Geometry Dash Lite is just as the title says - a stripped-down version of the original platform endless jumping game that a lot of kids and adults love to play. Every level can be played in normal or moderate practice, and depending on how well you perform when you get to the end of the track, you can get one to three stars back. Why wouldn't you aim for 3/3?
You have a square moving forward on the tracks, and when you see triangles, spikes, or any other kind of obstacle, tap or click to make it jump over them and complete the whole track like that to advance.