@BreoganHackett @jazz yeah totally. there must be *something* between Osu Tatakae Ouendan / Elite Beat Agents (performing to an existing song) and idunno, Panoramical (jamming on a very complicated soft synth)
(i might have been thinking of wasteland 3 earlier but there the song is more like a neat window dressing, not really the focus)
have you seen the interactive album xra (of "memory of a broken dimension" fame) made for methlab? https://www.youtube.com/watch?v=kG9ArdlK_gw (i have a copy of the windows build somewhere if you're interested)
@BreoganHackett @jazz oh i almost forgot about the "move to the beat while the level changes on 1/2/3/4" game friends of mine made: https://store.steampowered.com/app/925460/Vectronom/ (check out the incredible set we built for the multiplayer trailer)
still not what you're looking for i think but more mental filler for the design space between those extremes