[TOMT][Video Game] Old 2d game that managing junction of tracks, there is many colorful balls moving on the track.

It was an old game that I've played in my childhood, I dont remember what platfom I use. But it was satisfying, the game is about managing junction so the ball can move from one track to the other track.​What I remember is the background is dark, the track is white, and many colorful ball moving on the tracks. The map is like a puzzle that we need to make the ball move to some place. Oh each ball can have collision and will move the other way if the balls collide.​That's what I remember, I hope I can play this game again. Thank you. via /r/tipofmytongue https://ift.tt/2WyS4Yg