tile collision

blimey. thank you very much. ive kind of "bodged" it already so it works enough for now, but ill keep your code in case my efforts don't do the job. i basically detected a collision and moved the ball to the edge of the surface manually before drawing it again, giving the illusion that it bounced. i have also limited the speed so the ball can't pass through the wall in one "tick". it should be enough to do what i want but i will probably need your code for next time.

thank you again andres,

neil