Demo's should not cost money.
Especially when they're just key quests.
Sorry, man. I know game development is hard. But for real.
It doesn't cost money - you can choose to support the developer by tipping and get the demo download included, or you can get it for free by email request like clearly stated.
"In order to download this game you must purchase it at or above the minimum price of 2.99€ EUR. You will get access to the following files:"
The game costs 3 dollars on itch.io. I don't care if you can e-mail them for two days trying to get the file as well. The game costs 3$ on itch.io, no matter how you look at it. A donation is not charging for a product. A donation is a donation. You don't get goods in return for a donation.
Cba, you don't even understand what I said. It could be written differently, but that's it. It's people's own choice if they want to donate to support the developer or get it for free, no one is forcing you to pay for it.
I really don't want to have a discussion about something that is a fact, I just find your comment really misleading and unnecessary.