Came for the Tetris, stayed for the named color palettes. At first I thought these were official names but "Mexico According to Hollywood" kinda gave it away (level C8 or 182)
What a graceful way to handle levels beyond what you had the resources to include in the game. They could have wrapped around, but that would have been boring, they could have switched to random generation but that would have required additional code. Instead just let it slowly cycle through ROM and use whatever is there.
I'm not sure it was on purpose, but a nice solution.