we bought and already 100%ed the game "Shift 87"
walked around a little bit in repeating rooms trying to find anomalies

it was fun but it took us only 2,5 hours and cost us 2,5 €.

I guess it's more about quality than lenght and I liked it but I still wouldn't recommend buying it maybe.

I dunno! I've played free games that are just as good but this was basically free so I think it's fine. or not a huge loss. I would like to check out other games like this!