UoL gamedev - demo distancing ideas

keys - 

• ASWD  - lateral move (up/down/right/left) 
• F - faster, B - slower
• T - auto-targeting on/off
• N - choose next nearest target

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