Very hard, really very hard. I don't know how many attempts I did.
But then suddenly I felt it and was able to get to the treasure. Funnily enough, in my best try I started flying in a wrong direction for some reason and went far outside the map to finally realize I need to make the whole way back and more haha.
I really had fun after I mastered controls, cool little game. The highest I got is 2894 (is it highest possible? was not able to get even higher) after trying to reach a vulcano (successfully). I think the most important problem that takes the fun away is loading time after each fail.
Also it gets pretty beautiful when you get really high, all those little villages down there. I liked the drawings too.
Good job guys