Thanks for playing! I often find myself drawing and writing, as well, even when I intended to work on the code :)
Yeah, better visual feedback as to what's going on is big on the list - I plan to add fire effects (and change how fire works mechanically, so things take a while to burn and blacken and shrink as they do) and smoke, as well as a particle system in general to show which ways the wind is blowing.
(You can pause the sim with 'H', if you like- makes drawing easier!)