How do I make touchable sprites on the bottom screen so that when touched, they do stuff like say HI on the top screen if that is even possible?

Here's something I wrote that does exactly that - just put an ACLS above this [it didn't fit in the screenshot].

And here's a more simplifed version of that. Key: 225XS3R4 This is my brothers code, all credits go to him.

thx

No prob.

Attached is my version. The general steps are. Switch to the bottom screen and make a sprite there. Check if the touch screen has been touched. If touched check if the sprite was touched and if so do the thing you want. Just make sure you switch back to the bottom screen before checking for touch collisions again.

Thx :)