It's cute, and I like the idea, but I feel like it needs more. The quality of the video is a kind of poor, I don't know if that is intentional or not, it may very well be meant to look like a VHS tape from 1994. The "signs" of flirting aren't really signs at all, and maybe that's part of the joke? Maybe it just needs some work. It would have also been nice to have more than just one girl for interacting with, and different personalities and such... since not all girls flirt the same way either. But I think it could be a decent game still, with some work.
How To tell when girls are flirting with you.
A downloadable game for Windows, macOS, and Linux
On sucessful completion of this test you will have the skills to perceive flirtation in the real world.