I really appreciate these blogs. Turns out I never did have a full grasp of ! and $. This is greatly increasing my 'got it right' the first times and decreasing my 'gotta tweak it a little more' times. Thank you.
ETA: If you're taking requests for ideas for new tutorials, I think one similar to this but directed to the tilesheets would be great. I just recently learned by trial and error that you can't just copy and paste willy-nilly to any sheet and expect things to appear as you thought. For instance, Tile 0 of Tileset B erases what's underneath, but another tile, even if empty, won't do that (and maybe I don't even have that right). And it will only erase tiles of B, C, D, E, but not A. Otherwise it will superimpose itself (got to do with layers I suspect). Anyway, you see my point? I can't be the only non-artist out here who could stand to learn the rules of the tilesets. Just a suggestion. I truly do appreciate these short but sweet and so informative tutorials.