2 Ship 2 Harkinian (the Majora's Mask PC port) built for the web. Every asset the game would take from the ROM was regenerated: textures, fonts, faces, icons, instruments and voices. No ROM needed.
WASD stick · X A · C B · Z Z · Space Start · arrows C buttons · E L · R R · TFGH D-pad · Esc port menu · gamepads work
On phones and tablets: on-screen stick and buttons, portrait or landscape (add ?touch=1 to force them on).