Should I buy this game?

[Zanderat]

For the info you gave, I suggest you to buy Penumbra collection. (I personally liked them more than Amnesia)

...and in the end, if you end up liking the game, you get more gameplay from the collection (three games) than you get in Amnesia (single game).

One thing that I would suggest is that if you get Penumbra, come back here ask about the simple swing tweak. Trust me.