Hi, nice idea. I did not see that you could go to islands for upgrades but saw this in a later post. Since I was on a ship I tried to avoid those and saw them more as an obstacle then as an upgrade part, maybe add some port in a later update to make it more clear? I also agree with Dragon about the mouse controls, whilst feeling okay I did have some times where I lost control and it just spun.I do like the idea and im curious what you'll do with it. Good luck!