Definitely a very early prototype. I could complain about the lack of sounds, effects, animations, UI, etc, but I think I'd just be preaching to the choir.
The art is pretty good, and clearly beyond a placeholder. The style isn't really for me- I like colour too much- but it's well done.
The mechanics seem... fine, I guess. It's sometimes hard to tell what's going on without any of the chrome that didn't make it into this game.
The "paths" feel like a hack to technically quality as a Ren'ai, and I don't understand why I got the ending I did.