To review the controls in-game, click the "Menu" button at the bottom-right.
Movement: Arrow keys or W,A,S,D
Attack: Z or U
Jump: X or I
Guard: C or O
Talk to NPC/Enter Portal: Up Arrow or left-click with mouse
Item Bag: 1
Badge List: 2
Acolyte Ranch: 3
Item Hotkeys: B, N and M
Attacks can be performed while in battle. To perform a basic attack, simple press the Z or I key. To perform your "Up" attack, hold the Up or W key and then press the attack key. To perform a "Down" attack, hold the Down or S key and then press the attack key.
When a Special attack is ready to be used, you can perform it by inputting the "Up" attack command.