Sigh... it was all going so well. I'd reached level 49 on hard difficulty with 50 lives remaining, I was all set to score the badge. And then this great big huge swarm of balloons appeared and my computer slowed down like woah and I lost -_-
Phew, finally finished it. Most of the puzzles were easy to figure out, but the puzzle where you had to find a matching pair out of all those shields was hard as heck.
Just discovered something cool with the Old Glory: If you start firing with your alternate gun then press Z to switch to the Old Glory, it won't have that little pause before it starts firing.