A lot of work was done for being a solo project, so kudos for that!
I don't think judging a project still in development is fair, so I tried to rate what seemed to be in the most advanced state. The aliens' character design is nicely done, the idea of anthropomorphic sea creatures is interesting, although I feel like the resemblance could be more subtle.
The narration could use some zest, maybe it's partially because of the translation, since chat GPT tends to flatten everything. I've read the description and played both routes, but the concept of the story remained a bit cloudy to me.
Lastly, just to help, there is a weird bug on the character where they appeared very zoomed in and you end up talking with people's crotches for the rest of the game :D might want to check it out!
Keep working on it!