Right, I can remember this game almost perfectly, but I can't for the life of me remember or find the name.
A PC game (CD) that had puzzles ingrained in the storyline. The basic plot of the story is a rich young girl's parents go away for an amount of time, leaving her butler in charge. During this time, the girl's pet dog gets kidnapped by two thieves - they then send the girl a ransom note for the dog (not knowing her parent's are away). The girl, with the help of her two male friends (all children), search all around town for clues.
There was a small shop where you could buy like 6 items. The three hung out in a treehouse, and I'm pretty sure one of the guys wore glasses.
At the end, they find the kidnapper's hideout and save the dog.
Pretty sure the primary colour of the CD's picture was brown, if that helps at all somehow.
I played it somewhere around 8-10ish years ago.
If anyone has any idea or can help thank you so much!