Hi, nice to see over here.
We are very familiar with iOS System, building some of the very first apps on Swift language. Building Word Crush: Brain Puzzle could be a very good idea and its very addictive in nature.
I would like to know more if you are concerned with the game engine to be used to build this game.
Working on Unity could be great, as we have worked on Unity before and we could deploy this game to you under a week.
Additionally, we can also provide video previews for AppStore and on YouTube for free as a part of gratitude towards our new client.
I hope we can discuss further on this project.
Regards,
AZNinjaSoft Team.