I might be wrong, but I don't think it's possible that you can have two towers share the same email. Your best bet would be to either get on the discord and ask there, or email support@ nimblebit.com so they can either tell you whether your second tower was registered, and perhaps give you a hint to the email that it's registered to. Source: about 2 years ago

Tiny Towers - This is one of the first games I've ever downloaded when I owned my very first smart phone. Although it has aged a lot, I still find myself going back to it just for old time's sake, and trying to collect as many establishments as I can. They even have a vegas version if you like playing casino games, like Slots, Poker, or Black Jack. And their newest one being Lego Towers. Source: over 2 years ago

Maybe their other games might suit you https://nimblebit.com. Source: over 2 years ago

You can download the game here if the download doesn't open, right click and "Open in new incognito tab" should make it work. It was originally in korean, so don't worry if the files are named a bit weird! That's just because the computer doesn't have the korean language pack installed. (Just as heads up cause I see many people get concerned about it!). Source: over 2 years ago