I probably need a better short name for it, but it's users who are close to you in terms of score. So if you are 18th, it will show something like 15th to 22nd positions.
Not a bug, just the way saving scores works. Check out some of the posts in http://www.greenfoot.org/topics/736 for more information on how the Greenfoot Highscore/Data storage system is going to work in 2.2.0 :D
@programmer22: If you look above, you can see that this is just a testing for a new addition for the next Greenfoot version. It will come out with the next version, I believe.
You can save integers and strings, and these you can read out and build the game from them (for example an int which saves at which level the player is)
Zhirayuki: Sorry, I didn't spot your comment before. I've now uploaded the source so you can see for yourself, but essentially it works as follows. The vehicles are a fixed X width, so I always know the X coordinate of each wheel. I find the terrain height underneath each wheel and draw the two wheels. Then I connect the two wheels with a rectangle that is angled accordingly. It works quite well, although the vehicles "stretch" a little bit as they go up or down steep hills.
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