Trying to set up custom controls for a player 2 didn't work for attack and special, because the game kept prompting me for "submit" and "cancel" (which did work properly when entered). All of the other controls I had set up for player 2 worked fine. I was playing 1680x1050 windowed, if that helps with why the controls might be overlapping on that menu.
Game's otherwise been running fine so far! Controls feel tight on a Logitech controller, though I haven't tried keyboard yet outside of that issue.
EDIT: Also, attacking directly into destructible ground with a normal punch can sometimes warp you into it. I found this on the right side of the stage. Doing the same thing multiple times tends to warp you around.
Walking into a steep uphill corner can cause you to get stuck as long as you hold into it and flicker between falling/landing.
Shooting straight down while standing makes a circle below you in destructible ground with the ground you're standing on intact, though that one might be intended.
Charge attacking (the cool dash thing?) someone into a corner, then holding special after hitting them causes you to keep hitting them 2 or 3 extra times while you charge the beam attack. This one's actually really cool, but since you don't normally have a hitbox while charging it seems unintended.
LAST EDIT SORRY:
I had screenshake on, and after getting a KO with a charge attack into a beam somehow locked the camera in one position-ish with my character running against the wall (without me inputting) and massive amounts of screenshake. I hit reset in the pause menu and my character started charging a special beam in the corner with the weird camera angle and screenshake persisting. I exited to the main menu, but the screen shake and weird camera persisted even on the main menu while the game started lagging. Eventually it started running at about 1 frame per 2 seconds or so, and I had to restart before I could manage to get back into a new fight.