This is a freeware Windows™ and Linux game written for very simple playability and competition.
Once installed on your computer just tap the UP arrow once on your keyboard to start playing straight away.
The object is to keep your ski man (the red blob) between the fences (+ and +) for as long as possible using the LEFT and RIGHT arrow keys whilst the course scrolls downwards and gradually gets narrower.
(If by a miracle you manage to reach 1000m, the course gets wider, then narrows...