Is this going to be out for public use? In other words, will we as users be able to use this resource in our games? If so, then this can be in the Resources section despite it still being a WIP.
This is a great tileset, better than your Sonic one (Yeah, I still remember). Looking at this, I assume this is a sidescrolling tileset, for platforming games?

It's really cool to see one of those. I suggest you should add tiles that are in Super Mario World to this collection if so.