I had the same exact question because I failed today's level! The others have been manageable but this one didn't provide near enough moves and space to make needed combos. By the time I felt like I was making progress I ran out of moves. Oh, well.
From what I can tell, it definitely seems like a fun way to get a variety of boosters on your own, without teams or bubblegum hill. Looking forward to trying it!
I believe with the latest recent update they quit allowing Mr Toffee's Fair quests to get filled through Bubblegum Hill. I saw some other discussions about this within the last week or 2.
I think the only time you cant pick a tile is if you have already done 2 on that board in one day or are in the process of working another tile. In that case, you have to give up any work done with previous tile.
Occasionally I have done a row on my own over 2 days and it has always automatically awarded me after the 4th square was complete. As long as it is a completed row or column it should work. If it is 4 random squares or diagnol it won't count. If someone doesn't complete at least 1 tile they won't get a prize. Those are the…