I don't like the idea of basing too much of the price on hours of playtime: if you've got something really inventive and different with a short enough playtime

I don't like the idea of basing too much of the price on hours of playtime: if you've got something really inventive and different with a short enough playtime to not overstay its welcome, that's undervalued. Many games with long playtimes are boring and full of grind. As a player with a dayjob and many interests besides games, I don't value million hour playtimes: I value novelty and innovation. So I'm glad to see and pay for something like The Beginner's Guide for $10. Although that's probably a minority opinion: look at the Steam discussion forum for any indie game priced at or higher than $10 and you'll see at least one thread complaining that it's too expensive for such a short game(/not being written on a custom engine in C++).