Scratch

Scrolling help:
http://wiki.scratch.mit.edu/wiki/Scrolling
Platforms:

when gf clicked
forever
if <not<touching[platforms v]>>//or colour of platforms
change y by [-10]
end
if <key[up arrow v]pressed>
repeat [5]//however high
change y by [5]//again, you change this
end
end
end

this is a simple way. there is a better, much more complicated way involving variables but this is good enough to start of with.

Ill take a look, thanks alot! ill look into these