Thanks for your reply!
Honestly so far one of the hardest part was to prepare the video preview, and it seems I didnt manage to explain the core idea of the game.
The character moves, jump and fly, so the player use the arrow keys on the keyboard to perform those actions. In this game the various platforms are not in 'place' so the player to callect the 5 stars and get rid of the enemies (which is required to proceed to the next room) has to place the platform himself using the mouse... This can only be done by reaching certain switches located here and the there in the stage.
I will prepare another video, a sort of walk through of the entire level. Thank you for making me understand how unclear was this preview!
Thank you