Here is a game I am working on as of right now and just wanted to know if it would work for this competition.
Each color blue box are rotate-able.
It seems to me that if you add widgets that provide the ability to rotate layers or the layout as part of your puzzle it would work. For example, consider a level where you have the ball positioned below the target and don't provide an elevator--there appears to be no solution. But if when the ball rolls it flips a switch that rotates the layer or the layout, voila! It can be something that only gets unlocked in later levels, so your current levels would still be good. It is certainly an integral part of game play since there isn't a way to solve without rotating.
Anyway, that's my opinion. Maybe someone else can chime in here.
Well i maybe shouldn't have called it a bug since i'm not sure it's a bug so that's why i didn't report of course. It's just that i couldn't find a solution till now. When the layer rotates it doesn't trigger the collisions correctly. Maybe there's some other factors involved. I'll keep scrutinizing my project to find the culprit.
Did you see this thread?
Physics problem when rotating layers