I had a very good time playing this!
Even though it's rather simple and unfortunately doesn't have any audio, it's main idea is executed very well, and finding the treasure by examining the landmarks and cross-referencing the with the map is very satisfying (it is something we wanted to do in our game as well but here it's the main feature and works better imo). Unfortunately level 2 turned out to be too hard for me, so after some time I gave up (sorry 🙈). Edit: our team's level designer here, I beat the second level. I didn't know about hints in jurnal and with them, it wasn't that hard. Great work, friend, please finish game if only for me.
Also, islands sliding up from under the water as they get closer is such a nice detail, and it's little things like this that make a game great, I believe many developers would simply drive the camera z-far slider down instead and call it a day.
Good job making this game, thanks!