Lord, how I wish there was a way for me to ensure everyone knew what was going on with this thing...
(NOTE: you having played previous versions, I expect you at least sort of know some of this. I am also just taking the opportunity to re-tell everyone the updated version of the whole story.)
So, they're two separate games now, but they didn't start that way. The "chalk" game was the original concept (supposedly based on some much older game they made for phones like a decade earlier), and the side-scroller was a bonus mini-game for kickstarter backers at a certain donation tier ($40+). It was, at one point, incorporated into the main game on the menu screen, but as a separately playable mini-game. It has never been a fully integrated part of the main game (which in retrospect I think would have been good, and it seems I'm not alone).
Once the whole project reached a certain level of completion, they tried to put it on Steam, and Steam said, "That's cool, except for the dog in that mini-game. We can't have that." Now, the dog is there because fans/backers voted for the dog. They couldn't just kick out the dog. So, they decided to fully remove the mini-game and make it a separate thing altogether. They came to the conclusion that the main game was not selling well enough on its own, and they needed a way to provide the now separate mini-game to people. So, they started a subscribestar page. Previous backers did NOT get any kind of free access to the subscribestar. They also cut off our emails with free ongoing updates of the game(s) and polls/questions about feedback.
Now, the original main game (chalk) has been put on indefinite hiatus, because the mini-game (side-scroller) has become the greater money-maker. They hope that if they earn enough from the side-scroller that maybe, someday, they'll be able to go back and finish the chalk game. In the meantime, they are using the money they get to fund adding extra playable characters to the side-scroller.