sound button glitch?

For some reason, pressing my sound button is extremely hard. It only registers when touching a small part of the button in the middle.

On touched 'Sprite13'

-System Muted = 0 --------> Audio set silent

System set Muted to 1

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-System Else -------------> Audio set not silent

System set Muted to 0

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Set animation frame to muted

play.google.com/store/apps/details

Check the collision box on the sprite, it might be smaller than the object.