Update: Gameplay hints, visual improvements

Hi!

Updated the game with some nice stuff.

First and foremost, a system of pop-up hints to explain how things work along the way! Whenever you encounter a new game mechanic, a one-time hint will show up with a brief explanation of how it works. Of course, if you want to figure things on your own, you can click the "Don't show hints" button at any moment, and the hints won't show up anymore. If you want to see them again, you can click on the "Show all hints again" button in the game settings, and you'll start seeing all of them again.

Also a bunch of minor updates in no particular order:

• Fixed camera teleporting when changing focus between another window and the game window.
• Fixed game progress being lost after updating the game on Itch. You will lose the progress you had before this update, but from thereon it shouldn't happen.
• Under the hood refactoring of some UI elements
• Unit deployment menu now shows which tiles every unit can be spawned on.
• Units now visually move along their actual path when travelling to a tile, instead of moving in a straight line.
• Battle preview now properly shows counterattack damage as reduced after the defender had already lost some health from the initial attack.