Yes something new and refreshing and different...original
There's not much anything like this game, and the humor certainly helps. I think there's a huge abundance of very challenging games on the App Store that try to be like Flappy or Mr Jump (im guilty of this hehe) - maybe one out of a thousand will take off, but this takes the opposite approach - pretty easy to play and do well.. and it's just fun to watch/play - music is fun, everything about this game is 'fun'.
And agree with the point that maybe this particular game didn't take a huge amount of time to develop, but it was the prior experience and knowledge that probably helped it tenfold. I've personally made about 6 games, and my latest games I'm just starting to see more success. It's a process like anything, and rarely comes easy or quickly.
Also being able to earn things always helps people to come back, even if it's just as simple as earning a different style hat!
Congrats again on this - the humor and style is great.