i made a system that turns beepbox .jsons into a playable rhtyhm game
i have been working with gml ever since this post to make my own game using beepbox jsons and i got the jist of how to use it after many months.
upsides:
should work with any beepbox song, and hypothetically any song mapped to a midi file
allows for tricknotes using other channels and hold notes for notes that have a higher number of ticks than 1.
the starting location for notes as well as the input line for notes can be placed anywhere.
hold notes do actually work as holdnotes, you can't just hold a button and all the notes are read.
you can make it so that if not in a battle, the notes work as a regular ongoing rhythm game.
downsides:
only works with the bottommost pitches (1,2, 3, and 4)
i don't know how well it would work with ultrabox songs (or any other mod with mod channels, since i didn't code for tempo changes or beatskips.
this is using a song made in ultrabox, but doesn't have any quirky ultrabox mod tricks so i don't know if it would work with those. instruments are also not taken into account, but im sure there's lots of other cool stuff that can be achieved with beepbox jsons.
the basic battle loop was also made by sara spalding on youtube, but most of the rhythm game code was done by me