Decreasing step
I like the first Xeno a lot, so I am quite disappointed in this one.
-You can't build mazes.
-The second level is the hardest (I think... it's the only level, that took me several tries, even the hardest level on the other website was done with the first strike), so the difficulty seems not to be balanced.
-You only need three kinds of towers... no variety necessary.
-There are no highscore-possibilities, no replay value once finished.
And it's a bit cocky, to force people to go on other sites, to complete the game. It's just not nice.
PS.: I'm grateful for the flash pang game by the way. Brought back old memories. :-)