Damn I suck at flappybird... But I'm not going to rate the game badly just because /I/ suck.
5 seconds into playing I thought "Its just flappybird with a flying Ness head and EarthBound music." Then I saw the pop-ups at the bottom exactly like the game and I was like "INSTANT 4 STARS".
Despite its difficulty, this game is very good. 4.5 stars!