Released: 9/17/2021
This release specifically, although partially, fixes one bug where controller input would not be recognized if the GUI or command line window wasn't focused. This fix should at least universally ensure background input for everyone, which should (hopefully) be independent of whatever window they have focused.
Special thanks goes out to ConspiracyFactualist on GBATemp for reporting this bug, testing the fix, and just being patient and great to work with.