Level 1 solution

Solver-verified route

1. Tap Screw 1.
2. Tap Screw 2.
3. Tap Screw 4.
4. Tap Screw 5.
5. Tap Screw 6.
6. Tap Screw 3.

This route holds the buffer tray at a peak of 0 screws (the 3-star limit is 3). Solver difficulty score: 4.5.