I really like the character animations and the map overall. The 3D modelled coral looks particularly neat and adds to the environment.
I would say add some sort of collectable, and speed up the character a bit because it's quite slow. I also couldn't immediately tell what the obstacles were. I only identified that they were obstacles when I bumped into one. There's a lot going on in the map and I think that's what caused the obstacles to blend with it and become difficult to identify as such, so it was difficult to tell what was obstacle and what was background at first, so I'd suggest perhaps making the obstacles look more distinguishable from the background. Perhaps move the background trash bag piles a bit further away from the track so it doesn't confuse the player. Or alternatively, and this might work a little more effectively, make the trash bag obstacles spin or bob up and down. That'll probably help the player to see that they're obstacles.