*Facepalm*
Instead of using PRINT, do ?
? is an alias for PRINT but it's a lot shorter. Eg: If I wanted to show Hello! on the screen, I woyld do ?"Hello!".
Also, playform mechanics are relatively easy as long as you have experience and know what you're doing. You will want to set up a sprite, backgrounds, maps, etc.
Now you should learn how to use sprites.
Type SPSET on an empty line and press the blue help button in the upper right. Read the little reference and play around with it.
The management number is a specific number used to work with that one sprite. The definition number is a number used to tell what the sprite looks like.
Do the same thing with SPOFS (help button, empty line).
SPOFS moves sprite.