An excellent concept! I liked figuring out the best route and then finding the most efficient use for my chalk markings. You did a good job of ramping up the challenging aspects so that each new portion of the map felt different and a little more dangerous. I like the animation on the water and the black and white aesthetic. I had a little trouble finishing because the map on the third trip switched to the first trip's map. Overall, I this is very neat and I had fun playing it.