Excellent game, good concept and kept my interest for a while. The only big problem is after a point you can't see the enemies behind your walls. And it gets confusing. Like they will destroy a wall you couldn't even see at the time and then they win. I would prefer a top-down view or something.
Wow this is just an awesome game! Totally unique concept and very interesting and fun. I may have to get the shareware version.
I also like that it works on my older computer okay.