I think this can be improved by making the objects much smaller. I know that you wanted to make some sort of zoom restrictions, but making the objects smaller will be more convenient for those with poorer computers which can't download alot of stuff.
Also you might want to make sure the sledge is visible somewher on the screen so that other people wont get confused. And don't forget to set the sledge to follow camera
No surprise, you obviously spammed the same scenes over and over again.
Perhaps you would do better if you tried investing more time and effort in creating an interesting contraption than constantly pumpung out the same, unoriginal content that is all over Algobox already