I finished this amazing game today.
I loved it... for the most part.
There are 3 different kind of game in Summer in Mara:
1. Manage your island (this is awesome, lot of things to do in a day, lot's to build, you can decide what you want to upgrade to make your life easier for the most part (of course there are some items that you need to build)).
2. Discover the world as an explorer with your boat (this is the best part. I loved every island of Mara).
3. Fetch quests with awesome characters (this is the weak spot of Summer in Mara... you do meet a lot of great characters and that's good, but they also only ask you to go to do things for them (collect stuff for the most part)).
I still think this game deserve 9/10, the awesome music and artstyle, the really great animated shorts, every good part of this game deserve a 10 so the bad part is really a minor thing (as it also push you to explore more and the game does reward you for exploring).
I'm glad I played it and I will suggest this to all my friends.