I've had a couple game-stopping errors so Unfortuantely I haven't played too far it, but here's my first impressions.
I guess you only tested this on desktop and in editor, moving the mouse outside the gameplay window to read the instructions on the webpage causes the whole view to move. Might want to make the view scrolling with more intent to avoid accidents like that.
I got the Mayflower to the second planer, and, that's it. I don't know where to go from there. The instructions mention different ship types and really had to guess about them. I have no idea how to get different ships.
If you decide to continue working on this game, my main suggestion is to teach the player in-game. Try to find a balance between intuitive interface and outright hand-holding tutorials.