Cool game, could use improvements.
-This rating is based on the "Defense" option-
I really liked this game. When it started I was really impressed by the level of blood spatter and such. The game itself was very fun and I wanted to keep playing and getting all the upgrades.
However, there were a few negatives that I'd like to discuss so you can improve on these areas for your next game. First off, the blood splatter, like I said, was great. However, once I completed a few levels, it started to add up and really annoy me. I suggest you add a timer of sorts that makes a particular blood splatter disappear eventually. Next, after I had all the "top" weapons and upgrades, there was no real motivation to keep playing. Perhaps you could add bosses or unlockable weapons once you complete a certain number of levels.
Again, great game, keep making them.