Don't go back to Petit Computer. Most things in Petit Computer translate directly into SmileBASIC, except SmileBASIC is much faster and more powerful. There are a few exceptions like SPANIM, which is now far more more complicated. However, SPANIM is also much much more useful now. I'd stick with SmileBASIC. Your projects will have far more potential if you do.
3そうだね プレイ済み