For Emmy's line, it was the whole introductory section before you can click on a girl, Grace's lines included. This section repeating a second time was weird, as it was a one-time error. I really have no idea how it happened lol. It was some bizarre accident.
If you don't want people to farm stats, maybe a quit out warning where progress will not be saved? Not sure how difficult that would be.
Don't be too harsh on yourself! You did a lot of great work. Making games is hard! I've wanted to make one for ages but lack the skills necessary. I know some devs make beta/alpha testing as a patreon reward, you could always use that as an incentive. If you do an open release, I recommend having multiple versions of the download available (Such as if 1.2 comes out, make it like 1.2 alpha/beta along with a 1.12 version which was already tested). There's all sorts of options!!