Game App for Android and IOs - Dominoes

There are 3 domino variations: However, I want to keep the platform simple. The goal in dominos is to be the first to get the agreed-upon number of points (100 - 500). In Five-Up, points are scored during the play by making the exposed ends of the domino chain total to a multiple of five. The winner at the end of each hand also scores points for all the dominoes (aka Bones) remaining in the other player's hand. Players can select 7-bone or 9-bone hand variations.  You can play 1 on 1 or up to 4 Players at a time. Invite, Join or Play against the computer. Level of play includes Easy, Normal, Hard or Expert. (I have a few twists that I want to add to this, which can be further discussed upon the start of the project). I have screen shots.