Hi,
Thanks for the support. I'm very glad you're enjoying the game that much.
I do almost all the work on the game myself, including drawing tilesets. I do have an editor I use and as a matter of fact I did make a video of assembling an area once not long ago but never got around to uploading it, so that's something I might do at some point.
The characters are 3D pre-renders and that's about the only thing I don't do myself. Mark, a freelance 3D artist does all the work on them - modelling, texturing, animating, rendering. As for weapon-armor variations, there really isn't any smart way to go about it (as far as I know), you have to render out all the combinations, and that's the reason why the game is so heavy (800+ MBs) and will get even heavier in the future.