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. 2011 Mar 9;6(3):e17798. doi: 10.1371/journal.pone.0017798

Figure 3. Labeled screenshot of the ZPG.

Figure 3

Participants move their virtual character forward by clicking with the mouse on the field in front of it. Usage of keys in order to open the blocking gates occurs by mouse click on the key matching the gate's color. Collection of stars also occurs by clicking on them with the mouse.