I love this app (the original tile game), and have been playing this version for quite a while. The rules are different, which is okay as long as you know that.
My huge complaint is that apparently if there aren’t enough live players to quickly form a game, the computer steps in and plays. I can tell because there is no possible way a human could put tiles down that fast! The tiles are fidgety, and often don’t want to stay where I (and other live players) put them; they jump around for no apparent reason, and often don’t connect up with the tiles they’re placed with. That’s super frustrating. However when the computer plays, they always go right in place, one after the other, nonstop during that turn. Moreover, I’ve seen the computer play two sets of three tiles AT THE SAME TIME - that is not possible for a person!
That all gives the computer’s player a huge advantage, as it can play far more tiles within the allotted time. Basically if that happens, there’s little chance a real person can win.
If they need to have the computer step in and play sometimes, they should at least slow it down so it doesn’t have such a huge advantage.
Also I now seem to be mainly put in games with people who are far above my experience level. But even that isn’t as bad as when the computer plays!