Brain Test 3 Level 123
Loki is draining the Gems' essence from Alyx's father
A green button is missing on the device. Put a green button on the device and press it. Drag the gauge to the other way to pump back the essence.

Follow the screen sequence
Use the images as a compact replay of the solving path. The text below each frame explains what should change.

Video walkthrough
Same number in other versions
Brain Test versions can reuse the same level number with a different puzzle. If the screenshot or question does not match your game, switch to the same number in another version or use the nearby level links.
Strategy guide
- 1.First locate the missing green button among the objects and drag it onto the empty slot on the device;
- 2.After placing the button, press it to activate the device before attempting to manipulate the gauge;
- 3.Drag the gauge in the opposite direction of the current flow to pump the essence back into the father.
Common mistakes
- 1.Trying to drag the gauge directly without noticing the missing green button on the device first;
- 2.Pressing other visible buttons repeatedly instead of finding and placing the missing green button;
- 3.Dragging the gauge in the wrong direction after placing the button, not reversing the flow.
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