Whatever feels right to you of course! I sometimes offer my personal skills for free as well to keep it something fun instead of a job, so I understand.
But from the reviews I read even among people who bounced off the theme, they still see the undeniable quality. I feel you would not be charging for the game, but let people who like what they have already seen and want to support you do that.
Compared to the other games like this I support on Patreon, the quality is definitely more than enough.
Haha, I feel like I make a sales pitch. I will stop! :D
Whatever you decide, thank you for the game!