It’s actually odd that no one’s looked at it. I’d have thought they would have too.
Beta-testing can mean a whole lot of things. It’s generally helpful to know specifically what kind of feedback a writer’s looking for. I have, in the past, provided feedback that’s not at all useful because I didn’t know what was wanted.
Some writers for instance don’t want you to look at the code, they just want you to play through. Some want your opinions. Some want you to write down every single choice that you made so they can see which choices are most popular. Some will want feedback on how realistic the characters are.
There’s also some sorts of feedback people don’t want. If a game has a fixed gender protagonist though, authors can get frustrated if every single person suggests that they change this. So it can be helpful to avoid that frustration by saying upfront that it won’t change.
In my own case I was extremely fortunate and had two excellent beta-testers. One of them gave me a lot of grammatical advice which completely stripped the fun out of writing for me and the way it picked apart every single line made me feel as if my writing, and my game was awful. That was my fault since I’d not adequately communicated what sort of feedback I was looking for. Once I let him know though I was finding that feedback detrimental, he switched tacks and that same extremely focused attention to detail turned onto my plot proved utterly invaluable in streamlining the game.