"I actually found all those flappy clones happening great." Me too. I especially liked the clones that built upon the basic game play of Flappy Bird (single-fi

"I actually found all those flappy clones happening great." Me too. I especially liked the clones that built upon the basic game play of Flappy Bird (single-finger control of vertical impulses) but added additional challenge, like Heli Math (solve math problems to fly through the gap).