(If you have spscale on a sprite put it after spcol if you have it on the, it'll make collision accurate) Ok thats it for sprite collision, bad news is that I don't know background collision, but I will learn it and write it down in my notebook. 3) After using SPCOL and SPHITSP, take the SPHITSP variable(HIT,for example). And make an IF-THEN statement, IF HIT==(second control number no(cont)