It is too hard, the second level with the archers is just annoying, and the speartans can't throw spears anymore? That is more like a minus than a plus. Maybe there is a lot more to the game than that but I can't see it because of the archer level (2nd level).
It would really help if the speartans could throw their spears and raise their shields, instead of just standing there and taking damage from the archers which really defeats the purpose of a good defense, the range of the "castle archer" is also a problem since it becomes a redundant accessory in the second level, there is not enough range. As far as I can see, those are the only problems with this game. I know you did not want to make the speartan unit overpowered in this game but it is in fact under powered in the face of the archers and also too expensive. I enjoyed Stick War 1 and I look forward to enjoying an improved Stick War 2. :)