Happened in levels one and four, I kept shooting the same cowboy but every time his life bar went down, it just instantly refilled. He wouldn't go down no matter how much I shot him. :/ Ads after every level completed don't really help much either...
Could be broken..
It might be my computer, but when I play, at the end of the level the score doesn't ad up. When you take cover, you can't aim. This means that as soon as you start to aim again, you're being shot at again. The second level glitched to an instant win. By the time I beat level four, I still had sero points.
Good concept though. Needs work. And oh yeah, advertisements between every round. Good luck, I hate commercials.