Meh I played it I think... but considering I have no good opinion that I can remember it must have been nothing that gripped me. Only thing I remember was that I thought it was too much puzzle, and too little game.
Currently I am saturating my urge for space sim building with Kerbal Space Program and dozens of mods (Kethane, most importantly) so that I can build space station like mining vessels with kethane mining drones, rover miners and stuff
But I have to admit KSP is very hardcore and so far all I got to was the 2 moons (Although I got into orbit, to the first moon, mined kethane, flew to the 2nd moon, mined kethan, and actually flew back to Kerbin with the same lander and landed under engine power with no parachutes (although, that was because I actually forgot to put them on) Now I want to get a huge space-station into geo-stationary orbit so that I have the perfect launch position for long range travel.....
Although atm I am just messing around building massive 30 ton tank like rovers that can fly, mine and dock with stuff. And have huge tank reserves (but so far all I could do was a build a heavy rover with 4 giant engines that can do 2800 Vmax and in atmo... and a TWR of 1.3....
(that's 1600 Vmax too little to get into an stable orbit around Kerbin)
Anyhow, Just saying but.. Kerbal Space Program is by FAR the most addicting game for me. Except that still needs it's game (And they will do that in due time.. until then I gotta learn how to do interplanetary transfers.... last attempt I was off by 2° and 5million KM.... bah ;p