Sort of - Tradução em português

I've just received this twitter message from a friend of mine

"Planet Kruiser starts in 5 mins on rfcradio.com. I promise to be awake. Sort of. #pkrs"

What does "sort of" mean in this context?

In my mind the "sort of" is likely "kind of", but in this context it doesn't make sense.

Thanks
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Marco Catunda