I have no clue on how to use them. It seems the system's sticky keys and Deltarune's sticky keys are two different entities, seeing as if I press shift + control twice them seem to turn on, but I have to press them twice again when I'm in the game to turn them on, making it extrenely confusing to use with the visual guide that appears on the toolbar, and for no reason it just turns off in the middle of the run for no apparent reason. Help?

if you click shift once and then click a key it turns of shift, if you click shift twice and then click a key shift stays on, same for other sticky keys. also if you're in the middle of a run and it turns off, it is often because you clicked off the window or you accidentally clicked the shift or ctrl key again. hopefully this helped :)