Use the portal for the first time
Complete level 20
Activate the lever for the first time
Complete level 15
Complete level 10
Push a box 10 times
Complete level 5
Disassemble pieces 5 times
Push a box 5 times
Assemble pieces 5 times
Push a box for the first time
Assemble pieces for the first time
Activate the button 5 times
Disassemble pieces for the first time
Activate the button for the first time
Complete first level
Use undo 20 times
Use undo 15 times
Use undo 10 times
Use undo 5 times
Use undo for the first time
Use restart 20 times
Use restart 15 times
Use restart 10 times
Use restart 5 times
Use restart for the first time
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