@Flaterectomy mmh ... a fog of war or something like that might be a nice idea. Automatically solves some of the issues (like pilot getting to all places of the island right at the start). But this would need some island resizing and i guess i shouldn't do it on easy as there where several voices that easy was way to hard before.
And a tutorial is a nice idea too ... some small predefined level where you get told all of the movements and goals and whatever.
@kasarun yeah, the sunken checkmarks is still an issue i'm thinking about. The action arc was faster before, but some testers had issues with it because when it shows faster und you are kind of a noob in clicking or touching the tiles the arc would show and execute move instead of executing the default action (what the player wanted).
@pixelstuff another interesting idea. This would need some small work on the level generator, but certainly is possible. At least for the diver and pilot (currently i can't think of a situation where it is absolutely needed to dig all the tiles around you for winning. it just makes some situations easier).
But there are some setups imaginable which would convert this to a puzzle game ... predefined levels where it is predefined which tiles sink when and where the optimum movements are setup. Would need some tight level planning but perhaps an interesting game mode.
Thanks to everyone again for playing, there are some nice insights to gain here ...