Tap to run the drill and punch in the screw.
However, you should be significantly accurate.
Test your reaction and accuracy. How many screws can you punch in?

Compete with players around the world about how many screws you punch in to complete levels.

Good luck!

How to play the game:
1.Tap & Hold: Tap and hold to screw the drill.
2.Release: Releasing your finger, stops the screwing.
3.Make sure you've tightened the screw.