Elevator Action Returns/Controls

Saturn	Switch	PS4	Xbox One	Windows	Action
	or	or	or	↑  ← ↓ →	Move
				Z	Shoot
				X	Jump
+	+	+	+	Z + X	Sub Weapon
				Enter	Pause
N/A				Tab	Option
N/A				Shift	Slow

In the S-Tribute version, Sub Weapon can be mapped to a single button, but by default it is not.