UoL gamedev - demo aiming + firing

mouse - 

• point at the target to aim
• button to fire

keys - 

• ASWD  - lateral move (up/down/right/left) 
• F - faster, B - slower
• Space - fire

various display of distance effects:

• grid lines - toggle each axis with key (x, y, z)
• 1 - draw box around target
• 2 - draw scan lines
• 3 - draw trail effect