Gun Fu Stickman
Relic Runway
Fire Balls
Master Craft
Pixel Combat Multiplayer
Temple Run Tomb
Real Impossible Track 2
Snaker.io
Jingle Jetpack
Winter Clash 3D
Monster Craft
This is a relaxing endless runner game with fish and ocean sound. Just keep tapping and avoid the rocks and sea urchins because they can hurt you and make you to restart the game. I believe you can do it for a long time.