Thanks for the feedback~ The movement itself is pretty buggy and I'm pretty ashamed I shipped it knowing it was like that. There actually is controller support but I completely forgot to make it work with textbox interactions. And the uppercut buffer input was supposed to be in the 2nd hit of the combo too (but not the last one) but I must've forgotten to include it.
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okay, I just tried it with both my controllers, and it seems it only works with the one that has a broken R button. no idea why both controllers would work with my gms games but only one works with this, but I guess I could try sending you my controller input code sometime after I've maybe cleaned it up a bit more someday and see if that helps any