Someone else can help you with sprites moving left and right, because I'm not sure how to do that, but here is my example:
SPSET 0,0
SPOFS 0,10,10
SPSCALE 0,2,2
Just keep in mind that if you have multiple sprites on screen at once, you have to change the first 0 to 1 and so on and so forth.
1そうだね プレイ済み