Some of my most favorite games were fairly short experiences.

In fact I value when a game doesn't waste my time and is 100% fun, great content without fillers and stuff to just give you FOMO that ends up being boring and underwhelming when you actually try to do it. Even worse when you can't tell what is and isn't the filler.

Like, I've bought Outer Wilds for maybe 20€ or so and it is probably my favorite game of all time. I wouldn't have bought it for 60€ (and it's especially a hard sell because you can't really entice anyone to play it without spoiling some part of the game to them which really sucks; like, I'd argue even the Steam description already spoils some of the magic). But it would be 100% worth it even if I 100% the game after maybe 10 hours (and there is no way to replay it, unfortunately).

Similarly, I've gotten A Short Hike for free with a Humble Bundle subscription (and not like free to own as part of the monthly bundle but just free in their "trove") and I also completely loved it - was maybe 5 hours.

Meanwhile I played, say, Cyberpunk 2077 for free, finished it, and I am still kinda disappointed? Like there was good stuff in the game but I'm really glad I didn't pay for it - it's enough that I paid by putting the time in it. It left me with a feeling of wasted potential and like "surely there has to be something more" and then I finished the game and there wasn't more. It's so hard to explain... Like yeah, I enjoyed many hours of it, I think. But in the end it doesn't feel good overall.

So yeah, these are the extremes, but I really don't think you can put value on a game like that. Games by their very nature vary a lot and length isn't (or shouldn't) really be the main criteria. And enjoyment varies a lot as well. It can be so good that a few hours of it is enough, and it can be so mild that it's not really worth playing. Oh and that also completely ignores the fact that some games are made to be played for hundreds of hours by design (Factorio, Rimworld), while purely story games can hardly be stretched for dozens of hours and still be fun/interesting. And games with balanced narrative and gameplay can reach a few dozen hours but even for the larger ones going 50-100 hours is usually a stretch.