Such a fun and well-designed game! The pixel art is beautiful and the audio suits it perfectly. I got every upgrade and still wanted many more :) If you decide to add more after the jam, two features I'd love to see are for the camera to zoom out a bit as you speed up, and adding a risk/reward mechanic of speed vs keeping items in your train. Right now, there doesn't seem to be a big disadvantage to crawling slowly along the tracks in order to maximize the items you can keep onboard. It would be fun if there was some reason to keep moving relatively quickly, like a bonus for delivering items early or maybe the fish rot after a certain amount of time and you need to sell them before then. Great work all around!
