I've just beaten this game! I had a lot of fun. I'm psyched for Menos 2. ;)
It does feel a lot like a prototype though, so players should have a look at a gameplay video first perhaps.
I think the earlier levels were a lot more fun than the ones near the end. At the start, it felt like stealth was more possible and you could take on every man one by one. Near the end everything got frantic and it felt like there was no way to avoid a firefight since the enemies were standing in groups of three or four. The telekinesis became less and less useful as I went on as well. It isn't predictable whether a wall impact or a throw will kill an enemy, so I felt like I started to cheese it a little bit by firing the gun and just waiting for everybody to run into me. The latter levels were a bit overlong to take any chances.
I'm not very good at this kind of game, but managed to finish it. I don't think some of the obstacles are very fair. I would sometimes make sure to fire a gun off into empty space just in case there were enemies waiting just outside of my field of view (even while using L-Alt). Any time I used the guns felt like a game of luck, sometimes the enemy would die, sometimes we'd die at the same time. There's no grace period where if the PC and an enemy shoot one another simultaneously, the game gives the PC the benefit of the doubt.
The system requirements are a bit high (it really won't run very well on a GTX 750 Ti) so if you have trouble with the later levels, definitely put the graphics settings down: it makes it a lot easier to target enemies or to run away when you need to run away.