Single Screen App

Hi there, I am looking to get a template of an IOS app done in Swift which I have included image for. What I require is a clickable word tile as shown in the images: [login to view URL] [login to view URL] Once the user clicks on the tile, the tile moves to the empty slot. Users should also be able to undo this move by clicking on the tile and making it go back to its original place. What I would like: -Easily customisable with clear concise coding -I should be able to choose number of empty slots via code (image is just an example) -I should be able to select the letters of each button via code -Tiles should move to empty slot when tapped ina nice flowing animation -Tiles should be able to move back where they were when tapped -The total tiles letters value should be readable in code so it can be checked against the answer later. I hope I have been clear in outlining what I want. This is all that I want. So essentially it's just a single screen and feature app which I can later edit myself. If you can, please label the code so I can understand what is going on. If you have questions please do ask. As it's a relatively simple screen and single feature. The budget is £25-30.