A prince pushes barrels, candles and blocks through a castle of 10×10 rooms, a key of the right colour for every door, to reach Princess Margarita — Castlequest in America, and seven tunes.

Nothing here was transcribed by ear: every note was read out of the cartridge and is played by an emulated NES sound chip — two pulse waves and a triangle, each on a keyboard of its own.

The music and the game belong to their composers and publishers; this site only shows how the cartridge plays it, for learning.