Complex sentence: To get to the next landscape, the player must open all the Oxyds on the current landscape, which is done by touching them, but they will only stay open if you touch Oxyds of the same color in sequence.
Split into simpler sentences: To get to the next landscape, the player must open all the Oxyds on the current landscape. This is done by touching them, but they will only stay open if you touch Oxyds of the same color in sequence.