Yeah I pretty much neglected explicit tutorial text, the blue squares that show up when hovering over the second move (after having moved over a water tile to regain water abilities) allows you to spray water onto those squares, dousing those fires.

Yeah, I work on a 1440p monitor and not testing it on a more standard resolution leads to some... problems.  Still thank you for checking it out and giving it a try!  My first update post-jam will 1000% be getting it to scale / run at any resolution and have a fullscreen option.