Recommended categories for Physics Games
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USER INTERFACES --- User interface and menu naviation

IMPACTS --- Interaction with stone, wood, metal, etc.

PUZZLES --- Music stabs for success and achievements

ROBOTICS\Servos --- Robotic movements

CREAKS --- Creaking wood

SCRAPES & SCRATCHES --- Scraping and scratching sounds

MACHINES & MECHANICS --- Machine and Mechanical sounds

THUDS & THUMPS --- Soft objects impacts

VEHICLES\Thrusters --- Rockets and thrusters