Lol this is cool. I love the two gunfighters, only problem I have with them is the gun the gunfighter facing us is holding looks more like a modern day pistol than an old revolver.
As for everything else.. lose the black lines, add more detail to the ground, I highly doubt a wild west scene would be 100% yellow grass, with no dirt showing at all, and the grass looks very flat in places.
Add some detail to the wood on the cabins (at the moment it looks like plastic). A reference that may help you a bit with the wood -
Detail the donkey (or horses?) coat.
The rocks could use a bit more shading to make them look more 3d, maybe dither them?
The trough could use mroe detail aswell, if it's metal add shine. The water should be slightly transparent and show the bottom of the trough.
I'll add more later but I've gotta go now..









idk i like it but idk omg idk.....


10/10




