Good game, but gets a bit boring after a while. Still, the fact that you can take as much time as you like to craft weapons is very welcome. Also, the ending is pretty funny :)
I actually found the Psionic class to be the easiest one because the combination between Wall of Atoms and Mana Shield + Concentration greatly reduces the damage you take
mission 14 is just ridiculous!
not only do you have 4 to 1 handicap but they also shoot at you before you can actually see them
missions 1-13 were cake