Clearly and an appeal to developers, especially indie people who read along: power game rather short and put your heart and soul into stunning play content and beautiful detailed design as the player as long as possible "stop". Just as it makes Penumbra!
You get deepen beautifully designed content (Design TOP, even if the engine does not seem to be the best, but it's the design that matters) and is tied up! Something you of some famous, complicated titles can not claim.
CONCLUSION:
I play a deepes Indie Game, as a superficial, long casual game for the mass in which you stop making but it only makes it to finally durchzuschaffen, but just the opposite should be the case rather: you want to play a game as long as possible , just like Penumbra Black plaque!
