Itch.io is a platform for new and indie game developers looking for support and 5$ for this game is not just for the game, it's for supporting the developer.
As a solo developer, I could not make a 1h long game with new mechanics and I understand that this game doesn't worth 5$ but as I said it's not about the game only, it's a significant support to the developer as well.
sorry for your disappointment.
I'll try my best to improve myself! :)