I guess it's okay.
The gameplay does surely fit the theme perfectly; you are a popcorn kernel, whose job is to jump inside a pack of some sorts, and to hit other popcorn kernels, in order to pop them into actual popcorn. At first, it is fun to play, the idea is funny, and it feels satisfying to pop those kernels! However, the more kernels you pop, the harder it is to touch other kernels that are buried in the pile of created popcorn, thus instead of jumping, you need to start digging. And that, unfortunately makes this game not fun to play in the later parts of it, which is a real shame, because as I said, the first impressions are good!
As to sound effects and music, they're really good! The pops that kernels make feel oddly satisfying, and the music which uses percussion instruments, is nice to listen to, and at no point gets either annoying or irritating, which is a good thing!
Though, the graphics could be a bit better. They're minimalist, however, I think that due to used color palette, and the lack of background, they kinda feel bland.
Overall, it's an okay game, and it does interpret the theme well, however, it could use some more polishing.