The basic gameplay loop works! Ithink I'll benefit from some sleep now.
The basic Idea of my game is:
You found some treasure maps, but you don't know which one is the correct one. You basically have to sail around, compare your surroundings with the different maps and figure out which map is the correct one that will lead you to treasure. I am not sure about the obstacles I will create. My last resort is a race against a timer, but I'd rather find something more interesting.
I will see tomorrow :)