First of all, I'm glad you enjoyed the game.
We have never hidden the length of the game; we know it's not a long game.
As we have seen a good reception of the game and in surveys, the price has been maintained. Even so, we have been lowering the price with regular and frequent offers; it has been 50% off for quite some time.
And while I understand your point about the free game business model with Patreon, we cannot make the game free as you suggest, because otherwise, it simply wouldn't be profitable for us to create games. Support through Patreon is much less stable than a product sale.
Likewise, thanks for your opinion, we will take it into account for future games.