Scratch

what is the problem?

the strobe on the level 2 is not supposed to be there. arrow keys to move.

I can totally help! So on the stage scripts you put down:

when I receive [Next level]
forever
   next background
end

This is where the problem is. You have accidentally told the background to switch between background 1 and 2 forever! When you give it the command next background it goes ahead one background, when you tell it to do it forever. It flashes to the next background over and over, thats how you get the flashing. Heres how to fix it:

when I receive [Next level]
next background

This means it will only do the next background command once. Hope I helped :)

Thanks!!!