Passable, English needs a bit of improvement. Gameplay needs some tweaking, otherwise the same basic strategy with the same 3 units or so is enough to beat the game except for the levels with griffins.
Pretty monotonous and boring, basically stick your cursor somewhere in the middle of the road and SLOWLY click. Needs some sound effects and a better sound track at the very least.
It's a pretty decent sniper game with a nice learning curve. Pay attention to the mission briefing, there's a red zone that tells you where the enemies are so don't look ALL over the map!