Great game! A little buggy but entertaining and fun. If you are doing something when the upgrade pop-up appears, something brakes for sure. If you draw and delete enough lines, the colors repeat and if both lines pass thru the same port, boats get confused and all end up in the same line. And on that note, if you create more than 6 lines, you don't get a colored circle, so you can't delete it from there. It would be nice to right click to delete the last or first node of a route to edit it.
Thank you!! The game was made in a week, so I expected it to have bugs. I tried my best, but sometimes little things slip through the timeline. I am currently checking all the systems when the upgrade pop-up appears and yes, something breaks :,( I will check what you commented and try and upload a cleaner version in the coming days!!