I will definitely do an idle animation, but I need to prioritize the action poses first so I can demo my engine.
I'll consider boosting the brightness depending on how the backgrounds turn out. Thanks for the feedback.
Took a break from animating to work on new tiles, now 24x24 pixels:
NOTE: I used "dirty" tools to skew the grass used for the slopes. Just to get a sense of how they'd look -- I don't plan to leave them like that.
Regarding the blacked-out center tiles, I plan to keep them that way at least temporarily so I can focus on other more important assets.
It seems like there's a style clash between the rocks and grass. (I like the rocks better.) :/