(Excuse my english, i''m a french !) Doing a tile based game is a very good idea to do what you want (when you are a beginner). But when you need to do ground like / it is becoming harder. I am also doing a 2d scrolling game. But i don''t really use tiles. To do what you want you need maths !!! You have to use equations for each line: for example y_ground = 1/4 * x_player (y = 1/4X) I you need more help write me at Brahm2000@email.com I could send you source code and advices .... Good luck BRAHM_FR