Walking:
Keyboard: Arrow Keys (Recommended)
Mouse: Hold Left botton + Drag

Rotating:
Keyboard: Q & W (If able)

Select/Interact:
Keyboard: Enter/Space (Recommended)
Mouse: Left Click

Cancel/Menu:
Keyboard: Esc
Mouse: Right Click

Paused: F12

Drawing:
Mouse: Hold left botton + Move

Thump Out a Tune:
Mouse: On the special keys. Pay attention to the notes above (If need)

Numeric Input:
Keyboard: Arrow Keys (Recommended)

Text Input:
Mouse: Select + Left Click
Keyboard: Arrow Keys, Space/Enter