The Theme isn't optional, the Bonus Challenges are. The rules even specify as such. That said, I think I'll give this the benefit of the doubt and leave it here. The premise of the game seems to very vaguely fit the Theme.
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Oh I see! Thank you so much for that.
And actually I agree with you. It does fit in, based on the definition.
"An Eldritch Abomination is a term commonly used in speculative fiction, particularly within the realms of horror and fantasy, to describe a type of entity that defies conventional understanding or violates the laws of nature. These beings often possess vast, incomprehensible powers, exist outside the normal bounds of space and time, and typically evoke a sense of cosmic horror or existential dread in those who encounter them."
In my case the entity is abandoned ship and especially the ghost of dead captain who lurks the corridors.
I guess I just misread the first part of your requirements. Gladly it all works. Thanks again!