I tested the demo. I have to say that overall it's kinda neat, but there are still some things that bug me.
I think that the background should not move with Rayman when he is at the edge of the map, it looks kinda silly.

The tileset still looks a bit weird, it's like missing the 3Dish feeling, especially when some tiles are completely flat, and some aren't.
I also think that the enemies move quite rigidly, the movement should be a bit more smooth in my opinion.
When I'm about to enter a level, and it displays the level name, there is a big black box behind the text. I don't know if it's meant to be there or not.
Lums should also be animated along with the tings.

Now enough with the bad sides.
I think that mixing the elements of Rayman 1, 2 and 3 works really well.
My favourite level was the last one. I liked about the idea to recreate the level where the ship is following on the background.
Also, the Game Makers weird screen bug thingy did not occur for me.
Have you got any plans for bosses that Rayman has to fight face to face, if I may ask? I'd like to see some screenshots if possible.
