I played on the web using Vivaldi. The game didn't scale to my window. I had to zoom out in order to see everything.
The story was interesting. I didn't really like the main character very much, though I do think she was a well written character. I found the world setting to intriguing and it left me wanting to learn more about it and the shadows.
The art was well done. You did a good job conveying information and emotions with it. I really got a feeling for the characters based on the art.
There were a couple of game breaking issues I had. The game locked up completely if you talked directly to Hoffmann again after having the conversation with her at the cafe. I'll include a screenshot of the message I got.
The second happened the morning of the third interview. I went downstairs and looked at the fridge. There was a comment about the amount of food, followed by Diune walking to the counter and the screen going black. After waiting several minutes, I clicked the mouse, but things stayed black. Hitting space brought up a dialog box about needing to go, though after I used the arrow keys I couldn't bring up the dialog box again, and with the screen being black I couldn't see where my character was. ESC brought up the menu, and I was able to quit game and continue from my last save.
I also came across several issues that weren't game breaking, but still wanted to mention.
There were a few times when the dialog advanced on its own, which resulted in missing some things. At first I thought it might have been trying to imply being interrupted or similar, but there were a couple of times when it didn't feel like I was being interrupted when it happened.
Your phone stays open after you finish using it. It closes if you use the keyboard, but stays open if you use the mouse to move.
You may want to include text about getting clean clothes before talking a shower.
Both sides of the bed say this it's your side.
After your conversation with Hoffmann at the cafe, you can sit down across from her again and replay the conversation.
It might be nice if there was a comment about Marisa being in bed when you look at her side of the bed.
Your room has a red haze over it the morning after the attack on the lawyer. I wasn't sure if it was a deliberate choice or not, as I could see it going either way, so figured I should mention it.
Overall, I think you have a good game. It could work as a stand alone game, or you could expand it to be part of a larger story.