Four colors even, as the black on the BG is different from the black of the sprite outline! haha
This is three colours, not two. Looks like you forgot to count the black background xP
The animations look so smooth! Great job. The run at the start looks a little strange since it's happening in place and there's no context to show that the character is moving.
That's right, there initially wasn't a background at all, I updated the post and didn't change the color count, my bad.