Tsk Tsk Sean....
Difficulty: Way too easy, all you do is hold the Left Mouse Button and Move the mouse a little.
Graphics: There is a good medium here so I'm not even gonna bug you about the graphics, plus its not like it matters.
Annoying: I found a couple things annoying about this game. First, the controls, when I went to change targets the saucer was launched across the screen, plus it was near impossible to get it back in line with a building when I went off track. Second, the health on the buildings, I know you didn't want people to beat the game too fast, but it takes forever to kill buildings at the beginning of the levels. Last, the game is pretty pointless after you get the laser, which by the way takes forever to get.
RePlay?: Im just gonna say that this is not a game that I'd really like to re-play. Once and I'm done.
Recommend: Seeing your accomplish with the Thing Thing series just does not make me want to mention this to friends, so no I don't recommend this game.