Enebias: (..) superhardcore utterly insane masochist gamer like me do yourself a favour and don't play it! XD
Vythonaut: I consider myself a hardcore gamer but, quite certainly, not a masochist. :D I hope i'll eventually be able to send you a screenshot from the endgame when i get back to it, just to prove you were wrong about it or prove that i'm super clever or both.
*looks for said screenshot in the web* XD
Oh, I don't doubt you will be able to prove me you completed the game, one day.
Only... by then, you will be walking on the path of the Dark Side as I am. Blackhole pushes you in a direction where, passed a certain point, there is no turning back.
Also, I recommed you DROD, especially The City Beneath. GOG has the 1+2+3 package for a steal; those are puzzle masterpieces for the iron gamer.