On Tuesday, August 7, 2012 10:30:16 AM UTC-7, Antoine Vignau wrote: > I knew I should have written it yesterday! > > I meant tiles and scrolling should be one/two byte(s) movement but Mario and ennemies may move one pixel. > Scrolling the background by bytes is FAST, and easy. A bit jumpy, but now I can focus on game logic and collision detection instead of the scroller. Rich