As @nuun pointed out, Block Party uses a lot of horizontal ‘fingering’ positions (e.g. 1 0 1 0 1, 1 0 1 1, 1 1 1) to trigger all the loop/playback-specific functions.
I plan on expanding that to do cross-row stuff (vertical) for TPV2 at some point, but as extensions to that.
There’s also general finger contortionism that comes up more conventional controllerist type performances, but that’s more to do with playing a bunch of different things at once, rather than as an actual mapping idea.