Quick update:
I have found some help in other forum and the real Sucky has a very subtle animation, as it is breathing. The whole mini-game has 6 different stages to go through.
After the quest we enter an "end-game loop" where we have a scene with Rory and the credit's roll every time we go to sleep.
In order to change the day and keep on playing all you have to do is click "New Game" at the Main Menu (it will start from where we have left) and access your PC and enter the code "mangomango" at the command prompt to receive several itens, among them there is a Tent to sleep in and move the day forward instead of using the bed.