what i'm doing for the code is
IF B==Y THEN GOTO @SHOP
@SHOP
IF B==A&DOWN THEN SPSCALE #,#,#
I put # because i can't remember the exact numbers, and for the speed
IF B==UP&A THEN X=X+5
and so on
in the game there's the main screen where you move, and if you press a button it brings you to the 'shop'. I can't figure out how to put spscale and speed+5 into the shop.