This game is a bit of a let-down after the last ones. I liked the system where you can unlock better weapons, because then, you could tell most of the time what's better. This way, you're under fire, you can die in 3 seconds, literally, and you need to choose a weapon, exchange it for what you have, test it to find if it's any good, then get ammo? No way.
The first 5 levels in elite were challenging (although I didn't know about the reset button, which helps a lot). After that, it's just monotony. You'll have many many balloons coming and it's just shoot and shoot and repeat.
The last levels are a little better, though. Some balloons have a health-spike and overall they go faster. I just wish there wasn't so much filler in between.
 "Thing-Thing 4"){kind=icon}
 "Tarnation"){kind=icon}
 "Balloon Invasion"){kind=icon}
 "Papa's Pizzeria"){kind=icon}