Very fun!
I think the main problem with this game is that it's a bit too difficult. It seems like you have to wait so long before the plungers refill. Wow, I never thought that I would say something like that. Anyway, this was really cool with how wonderful the graphics were done! Everything just had the utmost detail and it was great to look at. The enemies are wonderfully designed. I just love how this giant house has so many things going on with it.
The music is pretty good too. There migh thave been a glitch where I lost my ability to aim properly, but it got better. It's just fun to see those big red things just fly across the room and hit people. Everything is just so silly in this game, you really have no choice but to love it. You didn't put "Defense" under the genre label.