You need to set SPCOL to both sprites for SPHITSP to work. So change lines 20 and 21 to this SPCOL 0:SPCOL 1 IF SPHITSP(0,1)==TRUE THEN GOTO @DAMAGE That should do something, although whether that's what you want is another story. (since "IF SOMETHING" is by default true, you don't really need the ==TRUE)