I played with no lag. I've got a great computer though. The sniper and shotgun are the best weapons. The sniper can literally two shot everything with Max Small Weapon +Headshot upgrades.
Took my 69:15 to understand and figure out this game. There are too many things that can kill you and the cat does not kill the things fast enough, even with the lvl. 10 claws.
The easiest way to get the millionaire achievement is to try and get the highest golden goose multiplier and continue to try and get a full flock. All the upgrades help too. :]
Use Sticky Tape for spider, and after you talk to the guy with the weird mask. Use the kittys at the tent with the soldiers. Then, use the other guy and kill the jack in the box guy. then kill poppet.
 "DuckLife3: Evolution"){kind=icon}
 "Vital Bloodshed"){kind=icon}
 "Robot Wants Puppy"){kind=icon}
 "Abduction!"){kind=icon}
 "1 Will Survive"){kind=icon}
 "Endless Migration"){kind=icon}
 "Toss the Turtle"){kind=icon}
 "Mecha Martyr"){kind=icon}
 "Clockwords: Prelude"){kind=icon}
 "Another Small Favor"){kind=icon}
 "The Competitor"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}