I remember that I bought this game early on and then could not play it for years because it had some kind of a bug with my hardware that made the game just turn black at random. Despite this, my excitement never waned.
Fast-forward to now when I have a new PC and this bug is gone, and I can say that this is an incredibly shallow game. Every 3-5 levels a new gimmick is thrown into the mix, but they don't really make it better so much as just turn a set of levels into something beyond the basic Pipe Dream gameplay. The biggest issue is that, unless there's some late-game revelation I never got to, the board remains roughly the same size and you're just trying to connect everything, sometimes before it all locks up and screws you on a few stages. Scoring is just based on speed, turning a puzzle into an action game if you want rewards: figure out the solution, then do it 30 seconds faster without dying.