Damn I REALLY liked the song! This was a fun experience.
The background and art overall is beautiful.
The line swiping was nicely explained. The movement is smooth, even if sometimes the pig jumps in such a hectic manner. I think maybe a limit to the size of the line could help though? It seems like making a ridiculously huge line every time kinda cheats the game.
On the audio department, the music was top-notch, I wish there were a bit more sound effects as the pig jumped or flew though.
The story was funny yet a bit tragic.
Overall a very fun game with a lot of polish, congratulations!