A cartridge that writes its own game. Every run composes original stage themes in the language of the console eras — the grammar, never anyone's tune. The constraints are authentic: in 8-BIT the whole band is two pulse channels, one triangle for bass, and a noise channel for drums — chords have to arpeggiate because there's no third voice, and the master is bit-crushed with no reverb. 16-BIT earns more channels, softer waves, stereo, and that signature short echo. 64-BIT adds FM bells, pads, and a deep sub.
Think song form: stages chain into worlds — overworld, underground, a water waltz in 3/4, a boss — sealed with a stage-clear fanfare. Every new world modulates up a whole step and commits for the entire world.
Blow on it and press start. A run of worlds, written live in the language of the console eras — pulse, triangle, noise and everything they grew into. Original tunes only. No two runs alike.