Thank you for playing and taking the time to give feedback!! I made the game in a week as part of a challenge and the disapearing line is one of the things I couldn’t fix directly. If you click the purple circle on the right you can delete the line so you can draw it again, and picking up boats and dropping them on an empty space returns them to the “inventory” so you can place them again. For the canal bug i don’t know what could cause that, i will look into it tomorrow. Thanks again!!