Note that it looks like this game was abandoned in Early Access. No idea if it is playable. At your own risk, etc.

As the poet says - things fall apart, and the center does not hold. I never ask people to agree in advance to delete giveaways if things go awry, but I do think it's only fair to mention:

This key is an old key. It was purchased some years ago. Far as I know, it's as fresh as it was the day it was bundle-bought. I haven't used it, and I haven't given it away. However, many developers revoke unused keys these days for no reason and without warning, so it's not possible to rely on keys the way we did once.

If the key doesn't work, please contact me. If I can fix the issue I certainly will.