Scratch

Il tell you how to make him stand.

First get what ever it is on the top (i.e Green Flag, "If key pressed")

1. Now put the ORANGE block called "Forver if"

2. Put one of the blues in the "Sensing" and then  select "touching color [] ?" 
[Just select the color you want him to stand on]
[Or for sprites just select "touching ____ "

3.  Now put how far it will move if touching the sprite or the color!
Most people just select.. "change X by 1 and Change Y by 1



-Nick

Assuming you just want your character to move along flat one-color surfaces with no walls, slopes, or mid-air platforms (walls, slopes and mid-air platforms are where the programming can get complicated), a basic engine allowing for left movement, right movement, and jumping/gravity would work like this:

when green flag clicked
     forever
         if key left arrow pressed
                  change x by -2
         if key right arrow pressed
                   change x by 2
         if key space pressed
              if touching color []
                   if jumping = 0
                       set jumping to 1
                        repeat 20
                            change y by 2
                        set jumping to 0

when green flag clicked
     forever
              if not touching color []
                   if jumping = 0
                          repeat until touching color []
                                change y by -2

(replace color [] with color of platform)

The jumping variable is just a flag to indicate that you're jumping so the gravity script which pulls you down doesn't take place. When space is pressed, it sets the jumping flag to 1, and changes your y position by 2 20 times so that you go up. Then it sets jumping to 0, so the gravity effect takes place, which pulls you down until you're touching the []-color platform.

I'm sorry if I explained this badly, I suck at explaining things. 

i dont get

THANKYOU PEOPLE!!!! i wuv u all 

Get rid of the forever if
move the "change x by 3" into the repeat-until loop

ive been trying to get my guy to STAND on the platform but he onlu JUMPS on the platform. How do i get him to stand on the platforms?

I need help! I wanna make a platform game with mid air platforms. Can you help? I would greatly appreciate it. Thanks!

Whats the best way to make the backgrounds change?

Check this http://scratch.mit.edu/projects/Llamalover/27039 out for loads of cool changing effects, feel free to take the scripts!

Hello, Boopaloo! When I finish the platforms, I can help you with the scrolling part. I've already tried it with Max, and it worked. 

what do you mean "not right arrow key pressed"?

I had the same trouble!