Yes, it automatically downloads that file and only that file. you can move anything you DON'T want users to see OUT of your public folder, but people shouldn't see anything except what is in your public folder.
I'm afraid I'm stuck on your game problem :(
However, I think there may be an easier way of building your game.
Have a sprite for each of the top arrows, so 4 different sprites (u1,d1,l1,r1) < ^ v >
Then have a sprite for each arrow that will spawn from the bottom (4 different sprites, one each for u2,d2,l2,r2) < ^ v >
Set the keyboard such that when
u2 (the bottom sprite that scrolls) ^
is overlappping or touching
u1 ^
and
W is held down
then
show sprite PERFECT !!!
You could have the bottom arrows spawn and move up randomly or you could use the TIMER event to make set patterns.
I think that might make it easier on you.
I'm a huge ddr fan btw :)