IMO, it's easily the best game you've put out so it's not surprising. Heck, even for this genre there aren't too many 2D platformers with sprite-based art that play any decently and have decent artwork.
I'm not fan of rigged 2D sprite so there was no way I would be using it. This game have so many things now but back then it didn't worth the attention it's getting. I was not sure if I should upload it but I did and the response surprised me.