I've tested it, my feedback:
-The controls are not the same, in flappy bird, each "on touched" make the wings flap ony once, here, it is more like a jetpack joyride controls (keep the touch to fly), I think it is better
-I like the graphics, but the fps were unstable, and I was on a samsung galaxy tab 3
-The splash screen of ludei is not your fault, so I won't comment that
-overall, I liked it but the framerate was a problem
Not a flappy bird clone since it is less about reflexes
Still the same concept though, but you did a fun little game, also I just spotted the upgrades, nice touch