Change into human:
Locate an area with an elevator, then use all the bouncers
and shoot the guns at the panel to the left of the elevator.
Collect the "T" power-up that appears to change into
human form with all weapons, maces, and a temporary shield.
Full power, extra shields:
Use up all items obtained from the previous level when starting
levels two or three. Collect the gem power-up that appears to
get full power and five shields.