We're pretty much due to re-vamp the whole site a bit, though I can't say how long that might take. However, I'll take a look soon (in the next few days) and see if there's a simple way to make this work better. In general though, if you have a scenario that's wider than the current Greenfoot site, you should be aware that it's not going to be particularly usable for all users - some of whom actually have a smaller screen.

Great, thank you, I am looking forward to it! If the repositioning is somehow not working, maybe some horizontal scroll bar (not in the scenario frame (?) itself, but for the whole browser window) is possible to move the scenario to the left. Yes, that's obviously true, maybe I will slightly reduce the size. First, I will see how it will look after you tried to change it, I guess.