Viva Caligula

Arrow Keys = Move
Letter Keys = Attack (with weapon assigned to that letter)
Microphone = If you have a microphone hooked up to your computer and this function is enabled, yelling, screaming or talking in a loud volume into it will fill Caligula's rage meter.
When Caligula's rage meter is full you'll enter Rampage Mode. Most enemies can be vanquished in one strike when Rampage is active.
Smash glowing vases to reveal power-ups and health items.