Ey, I immediately recognize that first song in the background, that's "Underworld" from Terraria. re-logic.bandcamp.com/track/underworld
The other song is the Tickle Belt song from Spongebob or something.
I ******* adore Terraria. Like, Minecraft can go eat a dick, because Terraria is better in every way. Unless it's modded Minecraft, then it's eh.