I like the idea of combining gameplay mechanics from the games you listed. I agree that more Undertale-like games need to exist. Personally I was confused when I saw the title font for your game and how much it reflected Game of Thrones. It made me think it was specifically a game based off of it. Maybe make the font a little bit different to show its not specifically derived from GOT?
I'm really happy you enjoy the blend of references behind the game!
To answer your concern -- the game does draw inspiration from Game of Thrones: both in the story where three rulers play a game for control, and also the emotional cello that drive certain parts of the soundtrack (not yet revealed).
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I am considering your suggestion to revise it. I tested over a dozen different titles and layouts. Removing any of the elements from the current logo, however, will negate the fundamental branding concepts that I want conveyed. Something to definitely chew on, especially before launching the Kickstarter where everything will be set in stone.
I'd like to offer a breakdown on my branding decision for the logo:
The logo is derived from a free, standard greek serif font. The underlines and overlines form a sheath around the sword-blade, which reinforces the main gameplay element of choosing whether or not to use your weapon throughout the gameplay. The cross through the "O" of "of" further compliments the sheath appearance, by representing a hardware screw.
In essence, I am using the bare minimum to functionally invoke what I want to convey. Other elements appearing with the above logo and it's variants, such as characters and the Tree of Life poster, further affirm that this is not a game based upon Game of Thrones. Among other reasons not mentioned, any association with Game of Thrones is purely coincidental.