@joeschmoe In you're world constructor (or actor constructor if you really feel like it) You say Greenfoot.run() and it will start the game without clicking the button.

Looked at your source code, and realized you only have to call setBackground(img) (in the render() method) once. Once you've set the image, you can edit it and it will show up on the Actor/World using that image. Doesn't change performance much, but just wanted to point that out.

In the description: "The results will be posted on Friday at the link below: http://www.greenfoot.org/topics/3937"

Multiple voting is possible? No it's not, and I've made sure of this. You can vote once per difficulty, and if you go and vote again, it will move your vote to the second one. You can't see the results, but I can, since I made the scenario.

You need to include the source code if you want to be able to enter the contest. You don't have to do it now, just sometime before the month is over.