Opus Magnum - the worst machine I could fit on one screen
Specifically to fit on one screen, all of the arms and glyphs have to be placed on the 8x15 play area visible at 1600x900 resolution without moving the screen or minimizing any of the trays. The programming has to fit on the screen as well, so you can only use 6 arms, and each one has to have instructions only defined for cycles 1-29.
But once it gets going, things can move off screen.
Worst here is defined only in terms of cycle count on completion. It has to complete, in theory. Since the game is Turing complete, you can certainly implement some awful computable functions, but given the constraints I went for just barely worse than exponential.
I failed, because this is substantially worse than exponential! Upon further analysis, the machine is performing tetration. The Nth output takes at least 1.85 ^^ (7N+1) cycles to drop.
More detail at https://www.reddit.com/r/opus_magnum/comments/skpyeo/this_machine_will_eventually_solve_face_powder_in/
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