The boy's look similarly sized and aged, why should one babysit another? Also the youngest brother looks too old to be so amazed by Dora, in my experience boys like something with more action and fighting. I found it weird that they have stuff like skulls lying around house and that he calls his brother by some stupid moniker, the relationships in that family are strange.
The treasure map puzzle was good, a pretty smart puzzle and main feature of this game. The rest of puzzles were pretty basic.
Otherwise the game is a bit too short. Over in 13:19 for me. Backgrounds are nice but character movements are not animated.
The ending and father's reaction make no sense.