This is a pretty decent game; there is a clear story, but it doesn't distract from the game play. This is a nice defender game, but I feel that more could be done to improve it. For example, one of the biggest problems with this game is how difficult it is to NOT lose health; that makes it way too easy. Another big problem with this game is that the boss health is not indicated; whether you shoot them or not, their health remains the same, and this makes the boss battle nearly impossible. Other than a few glitches, this could be a great game. Overall, this is a cute and clever submission to the portal.
good game, nothing wrong with it, just boring though. i had to force myself just to play through level 1. needs a deeper story, maybe.
In respect to defense games genre, quite a good gameplay, nice idea and excellent graphics that I haven't seen in quite a while. Maybe the game should be a little bit harder. I had to switch to hard mode.