very clean, and well-executed game! I liked seeing the loops work out, and it's cool how you can upgrade to make the puzzles easier. I got until the 4th upgrades in the fuel and fishing speed, and fishing radius. Often, it felt like the boat went too slow. Also you can farm things easily, to get upgrades, restarting early, even on easier fishing levels. I don't know if farming money was intented, as a sort of cushion to keep people going or not.