Yes, but it's either quite some tedious work to get it to look good, and I don't want to release something that just sort of looks alright maybe. So I'm pretty certain that I won't be doing that in the next few years. But of course you are (and everyone is) free to take the tileset/creature graphics and resize or redraw them at another size to fit their needs. If you really don't care about the size as long as the aspect ratio is not square, just increasing the size of one side shouldn't be all too much work.
To do it
properly, you'd have to resize and correct (or in the worst case redraw from scratch) most of the tileset (let's say 200) and all the creature tiles (400?) in a ~4:3 format, and change all the creature graphic text files (the text files in
raw/graphics/) accordingly (just search & replace 18x18 with your new size - 18x14 for example). More information on that is on the wiki pages for
graphic set and
tilesetThe easiest way to get
good enough results would probably be to resize the tileset to a couple of different sizes and see which looks like it needs the least amount of correction. Decide on one that is closest to the size you want, and look at which tiles look the worst. Redraw those manually and save the image as transparent png again. Maybe it's already good enough for you that it doesn't need any redrawing.
I just played around with it a little and 24x18 as well as 18x14 seem like really good candidates. I saw barely any bad tiles in the tileset. 14x10 already looks pretty bad and 12x9 would be nice to have, but it's completely illegible and would require pretty much redrawing everything from scratch.
Increasing the size is always gonna work better than decreasing obviously. As the tileset has little to no dithering, shading and anti-aliasing, I recommend Nearest Neighbor as resizing algorithm.
On that note, if people like a 36x36 tileset, that's of course trivial to do as there will be no reisizing artifacts with a 200% increase.