I was fairly harsh in this VOD, and I apologize for it. I will try and elaborate on my thoughts more in this feedback.
https://www.twitch.tv/videos/2767018331
I have no real issue with the gameplay itself. It's a bit rough around the edges, sure, but it's fine, and the idea is good, and I did enjoy similar style of games (Outer Wilds, Loop Hero). It's a bit of a moon logic puzzle, but it's fine.
My main complaint is with the VN side. It's... Rough.
I have no problems with isekai, or "loser hero" archetype, but the writing makes me extremely annoyed. It's just... neither appealing, relatable or comical. The introduction is fine by itself, it's not really horrible - but when the dialog with ??? keeps going, and going, and going - it's a drag, and it casts shade at the character intro, making it retrospectively worse.
I honestly have no idea what tone you're going for. Is it supposed to be comical, or serious? Because it feels jarring, like you are trying to write both at the same time.
It's just not fun. It's not engaging, and the "I'm a real loser let me sit there and watch the girl kidnapped" after some retries really doesn't work. It doesn't motivate me, it makes me want to turn off the game.
I suggest either taking point from other VNs, or unironically give AI a try. Some models - especially 12B ones, can be run on the CPU. Muse-12B and Wayfarer-12B are really good at setting atmosphere and describing actions respectively, and koboldcpp is very easy to set up and run, and includes a UI.