I think no one has attempted to make a game like Fez so perhaps that’s why there is a low response. It took around 5 years to make that game and it wasn’t on a 2D engine. It relies on interactions between 3D and 2D space. Trying to make that on GD, I think would be extremely challenging but you might be able to do some kind of pseudo-3D effect which might be similar, but probably inferior. Maybe this thread will give you some ideas though…