Scratch

1. Depends on how you want it to interact. If I chose a way it probably wouldn't be the one you were thinking of.
2. Use the

when [space v] key pressed

for the key you want and make it do things.
3. You send a

broadcast [message v]

to the stage or whatever your sprite is that is the level to change costume/background when a condition is met.
4. You put a

forever
wait until <touching [#FF0000]?>
die action here
end

and put your die action there, such as going back to start, losing a life, etc.
5. If you want to make it bounce off the edges of the screen, use

if on edge, bounce

or for walls, program it to move in 180-x˚ in the right direction, which is pretty advanced if you've never programmed before.

If this is confusing, ask more questions or give more details about what you want.

Last edited by kayybee (2013-03-16 01:23:17)

Look on the wiki it answers all your questions.