Glad to hear you like it so far!
That little dino could use some more body & head movement when walking, though.
Yeah, I'll see what I can do.

My only real critique would be that the side and front sprites are hard to relate to the same 3D character.
Agreed. Maybe his head should be a little narrower in the front view? I'll experiment.
Any project to make give the tail its own room so that it can giggle behind the dino when walking up ?
Yeah, that should be doable.
The tiles especially are great although almost feel a bit over-detailed, po-faced for the theme. I much prefer interior rock tiles to some of the alternate, bordering ones; perhaps the variation there is unnecessary.
Initially, I thought about going with a style closer to an earlier tileset of mine. Would something like
this, except with less of a tiled look, be better?
Titles feels a little flat so far. Descriptively; looks like the top of a waterfall more so than an ice rink and I can't tell that it's a frozen dino-buddy and not an anthropomorpic beverage-cooler
.
Yeah, I added some more details to the frozen dino, so I hope it's better now.

Also tried to make it look more like it's a water layer on top of ice.

I think the speed lines need to be toned down and maybe given a different angle. I also want to see if I can make his closest hind leg bend more naturally.
Idea: can you give the dino little skates. please?
Edit: the water-slick tiles are exclusive from the ice with lava under it. I can see how that makes sense from a game design design perspective if blocks are to stop there but it still looks strange.
Once you're on the slippery tiles, you have no control of the character until you hit a different kind of tile. I wanted to make that lack of control more obvious to the player by adding the sliding animations. I think by adding skates, there would be some implied control, which he doesn't always have.
Not sure what else to do around the lava block that would read well within a single tile space. I agree that it looks a little odd that there's ice around the lava, but no water.
is the side-sprite + top-tiles perspective mix voluntarily, btw ?
It seemed like the easiest choice at the time, but it does look a little jarring. I'll see if I can try to make him look like he's viewed a little more from above.