add the function to choose circle or cross.add singleplayer and multiplayer functionality (its multiplayer for now)fix play-again button (its always there and works but alpha is 0)- add computer-logic for singleplayer
add difficulty seekbar if singleplayer (easy, medium, hard)- easy - computer marks at random position
- medium - one move random, one move strategic
- hard - computer marks strategically
fix fullscreen issueadd fragment instead of activity? idk yet
