Can i get a walkthrough? Or at least a little guide on how to play it.

Here you can find a demo:
http://sharks-lagoon.aceboard.fr/215394-2094-5215-0-Demo-videos-some-games.htm

About Don't wake her there are also a lot of discussion-threads here in the forum. Just have a look on the chapters "Shark's games" and "Doctor shark consultations"!