This is version 3 of the demo. From memory, contains almost half of story modes battles, 2 weapons, a few allies and versus mode.
Default Player 1 Controls
Left/Right - Move (double tap to run/bounce)
Up - Jump(double jump)
Down - Duck
Walk away from 1 on 1 opponent - Block
Z - A/Confirm/Attack1
X - B/Cancel/Attack2
C - C/Change weapon(story mode only)
ESC - Exit menu/screen/game
To change these or check out player 2's controls go into the options menu and check out controls.
More info here: 2hitstudio.com