There are 4 attack buttons in Vita Fighters: Light, Heavy, Special, and EX/X. They are notated using L, M, S, EX/X. the numbers to the left of the attack notate in what position these attacks are pressed. The only attacks that you can't press directly are medium attacks, these can be done by pressing Light twice on hit or block. They can also be done in neutral by whiffing a light then performing a WJF to get the medium.
Universal Move List
Walk - Hold or for backwards and forwards walk, respectively
Forward dash -
Back dash -
Jump - or or for backwards, neutral, and forward jump respectively.
Airdash - while in the air.
Backwards airdash - while in the air.
Throw - then
Block - Hold or for stand block or crouch block, respectively
Block Reversal - while in blockstun
Quickstand - Tap to quickstand when knocked down.
Rolls - or when knocked down for a forward roll and back roll respectively. Forward roll cost a 1 and a half bars.
Burst - when in a juggle combo. Costs 2 bars of meter.