not to discourage you from continuing. making a completely different game than line rider, based on levels where the object is to get a certain number of bounces, could actually be really fun.
line rider actually started off as this simple game on someone's deviantart: http://fsk.deviantart.com/art/Line-Rider-beta-40255643. it just incorporates certain things like having the "rider" automatically go to the start of the line, smooth riding, a camera which follows the rider, the ability to make loop-de-loops, and neat yet simple graphics. my point is that if your game is exactly like another game, yet not as finished, there's no real point in posting it yet.
just got the impossible so it isn't really impossible! just play it through about 5 times and get a feel for how everything works, and you can do it with your eyes closed.