@Veho - Unlikely, Toby Fox is a master of properly using leitmotifs and the like.
I'd be very suprised if it's unintentional. (Some Undertale tracks use Homestuck music as their base, and even those tend to be used in thematically similar situations.)
You control a kitten. You fall out the window and have to make your way back home. Solve some light puzzles, do cat things like knock stuff over and steal things, trip people up when theyre walking, pounce on birds, complete goals/tasks etc. in the process of getting back to your home.
@SylverReZ It's short but adorable imo. Im a HUGE cat lover.Can be completed in a couple of hours if just going for the main goals. But can be stretched out a good deal by exploring and doing everything there is to do and see.