As described by others, it feels like it's more mid-development.

I do enjoy the Remia-Artwork when checking her status. Would be cool to give her a few more inbetween states between in control and fully submissive, to show her gradual digression.

My main issue is the lack of knowledge. Finding clues so far is a gamble and trying to keep Remia save is near impossible.

Idea if you don't want to make this a visual novel: make it a "find the difference"  game. Each location has a base-sprite and for each difference hidden in it you can send either yourself our Remia. So if there's only one difference you can find only one clue, Two differences for two clues. But if there's a specific Element hidden in it (like a heart?) it will also increase Remia's submissiveness.

The character art and interface look nice. I feel that the fade to black time transitions should happen instantly or have small illustrations of the investigations to accompany the text. It's a bit too early into development for me to make big judgements and suggestions, but I do enjoy this style of gameplay and I think you've got a lot of the fundamentals of it in place!