Equip the Mystery Chip and complete Gear Fortress 1 to get bonus Screws. Completing the stage under a certain time limit provides double the amount of Screws!
Newcomer: Over 8:00—700/Under 8:00—1,400
Casual: Over 5:20—700/Under 5:20—1,400
Normal: Over 5:20—350/Under 5:20—700
superhero: Over 5:20—350/Under 5:20—700