The dragging isn't very nice. If you want I can help you. The guy, who has to be dressed up, seems a bit unproportional. But it looks very nice!

I experienced, that my form had problems in understanding object orientated programming after one year lerning practice with Greenfoot. It could be that people could get a wrong sense for objects, when they start learning Java with Greenfoot.

Seems to become great. Maybe I will use it, when it's finished and when Tiny Tank is finished. Maybe it is possible to don't have to use the scaleX and scaleY methods, by using the original image and scale it afterwards again, so that you need only the method scaleImage(GreenfootImage image) which you have to use after changing the images. This would be easier, if you want to use old scenarios. Nice work!