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Goal level
challenge
Test your perception speed
Round 3
Find the green triangle before the timmer
runs out.
Tap twice or spread your fingers to zoom in
Click once to zoom in, click again to zoom out
Roll the mouse wheel to zoom in/out
F11
Switch between fullscreen and normalF10
Switch on / switch off the soundF10
Switch on / switch off the soundPageUp
Previous double page
Drag handle to switch page