To be honest, putting my thoughts on this one into words is going to be a little difficult, mostly because I can't help but feel like the ogre from that one meme about reading Ulysses and only being able to identify the basic surface themes.
I don't feel like I know enough about the film that inspired this VN to comment about how well it reflects the inspiration, but I'm a big fan of the way that the novel depicts the character's conversations as existing and moving in "real" space through the backgrounds, and the conversations themselves straddle a good line of being realistically meandering without feeling pointless or boring.
I like that the flaws in Minna & Markus' characters are introduced gradually enough that the ending feels earned without being predictable, and the final scene with the choice at the end being a callback to Minna's idea of a VN using choices to control a character's feelings rather than just their actions was a nice touch. I'd say the "meta" aspects of the story are the strongest thing to me, overall, even if I'll admit there's probably a good portion of it that escapes me or that I might be reading too far into (I knew something was "off" but I didn't even realise the game was created in Godot rather than Ren'Py until I saw someone else point it out, and I'm not 100% on whether the conversation about the shopping centre's walls and Minna commenting that she felt they were 'lying' to her was meant to be a deliberate nod towards the concept of "the 4th wall" and how videogames specifically as a medium can be used to play with it).
I think if I have two complaints I feel comfortable making, it's that the "circular" nature of the VN can feel a little confusing (and not necessarily in a good way) on your first playthrough, and that for all I enjoyed the way the game makes use of its backgrounds as a "real" space that the characters move through it made it all the more jarring when characters would end up succuming to "Visual Novel characters standing on the tables" syndrome whenever they sat down at a restaurant or something.
Overall though I'm definitely glad that somebody made something like this. It's refreshing that a story all about people with an 'outsider' perspective making use of that perspective to create something that goes against genre norms was able to reflect that concept in its own story. I might not be the target audience for the story, but like Minna herself I enjoyed my brief trip into something a little different nonetheless.