Thanks for playing!
Yeah, I wish I had time to implement more tutorial stuff, unfortunately the game jam timeline got the best of me. I'm hoping to improve on a lot of that post jam.
The half medallion disappearing is kinda strange, there is a way to expend it, but you most likely would have noticed doing it, so I'm inclined to think that it vanished due to a bug. I'll definitely look into it!
I intended to add more to the home island, but again time got the better of me, so currently none of the huts have any functionality. There is however merchants on the sea that will give you a chance to spend some of that hard earned gold on upgrades :)
I think the idea of adding a crosshair is an excellent idea, I also have some ideas for smoothing some of the rougher and more confusing mechanics in the future.
Thanks again for playing, and giving such a great breakdown of your experience, it will definitely help us improve the gameplay post jam!