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I've played twice now and keep running out of oxygen. I can't figure out how to surface! :(

I see the icon for surfacing but can't click on it. I've tried hitting the space bar repeatedly but that doesn't work either. What am I missing?
Hey there Ahclem,

Thanks for creating this post!

To resurface, when you are near the water's surface an icon appears. You press and hold the Interaction key (should be F, just like when you pick up items) and when it's full it will enable you to resurface :)

Let us know if this works! :)