There are playable objects on the screen. Play the objects with selected tracking input. In mouse/Keyboard mode, use tab and shift+tab, or left and right arrow keys to move through playable object and Spacebar or Enter to activate objects. Screen reader quick navigation features should be turned off. If you are using JAWS you will have to turn off Virtual PC Cursor (insert+z). If you are using NVDA, turn Browse Mode off (insert or caps lock + spacebar). If you are using VoiceOver, turn off Quick Nav (left+right arrow).