I honestly missed the whole grave thing. It struck me much more as a tragedy than a story of denouement. I saw him with a sad girl who he loves and wants to show simple joys to, but she does not see him, wrapped in her sorrow as she is. As he spends his life searching for things to give her and brighten her world, he also gives more and more of himself and his journeys wear him down until finally, just as he has coaxed a smile from her, his travels catch up to him and he passes on, finally content. The girl is at peace though, because she knows that he spent his life bringing her cheer and a proper mourning for him is to live with that happiness.
Good concept, but the shooting and bubbles need to do something. Also, the idea that you need to get all but one of the tiles is ridiculous; even following the opponent and immediately retaking the squares he gets, it is impossible or nigh impossible to do. The ship controls work pretty well, there were only a few instances when it wouldn't turn. The tile flip animation was very smooth. Overall, a good first try but severely lacking in content and player-friendly mechanics. 3/5 on a hope for future games.