Amazing parody mashup, so fun, and so satisfying in many ways! :)
First of all, the Earthbound inspired graphics and music are nostalgic and amazing, really involving and enthralling. Good stuff. I also like how the messages that pop up (when you knock down a present, gain a point, erase a pencil statue or die) are inspired by Earthbound's battle system messages. Some sceneries (like Technology and that other one) give me a bit of an eye sore, but they are also cool.
Also, the gameplay is the best Flappy Bird parody I've seen so far. First of all, it's got more of an objective than Flappy Bird, with the present collection feature being more or less a quest element added into the mix, leading us to many different places, all inspired by Earthbound sceneries, but with the same core gameplay. Also, there's also the pencil statues and the erasers, making it so that the in-game features themselves are different from those of Flappy Bird.
Another thing I like is that, for some reason, this game manages to be a lot less frustrating than Flappy Bird. I can't tell if the flapping is smoother or the gaps are larger, but most of the time, this game felt a lot more forgiving, and therefore less enraging, than Flappy Bird.
I tend to hate Flappy Bird and anything related to it, there's just nothing in it for me, but this game is the exception. This game is enjoyable, satisfying, nostalgic and addicting.