This is amazingly addictive for a game with NO object. There is this guy, Bosh, and he’ll be riding a sled. You’ll be creating the environment for Bosh.

Flash Game Creator: Bostjan Cadeze

Instructions: More akin to an internet physics toy, Line Rider quickly gained popularity upon its release in 2006. Draw one or more lines and a boy called “Bosh” will ride the track on his sled when the “Play” button is pressed. Be mindful when drawing the lines because the game includes simulated physics, which means that if the lines are not smooth enough, Bosh can fall off the sled and the track, which can be quite amusing.

Controls: Just use your mouse and a bit of creativity.

Note on the flash game: Despite its simple premise, many complicated tracks have been created with loops and stunts. Enthusiast have shared their creations on Youtube.