Surprisingly, you can also go diagonally

I thought it was only adjacent tiles, but you can merge diagonally too. Since there are no endless choke points, I find myself playing mindlessly. There are forced ads, but they're short. There are also reward ads, but so far I feel like I don't need to watch them (like for diamonds or extending the experience boost time), so I'm playing with very little stress from video ads. ※Currently, there's also a level 20 verification quest, so it's a good deal combined with the hidden quests. Reason for writing on the bulletin board below I uploaded this content for the first time with a pick video, but due to file size limitations, I uploaded a significantly shortened version. This screenshot was taken for the verification quest. It's nice to encourage various interactions, but adjusting file size limits is a hassle. Not knowing what video length is recommended is a big factor, but I think 10 to 20 seconds at most is safe.