Gotta say, like everyone else, the lag makes it unplayable. Plus it's funny when the cats end up on different floors and the game starts glitching bigtime!
I had Poseidon's Blessing and was over water (the water was about to end but I was still over it), but still died when I got hit. 2/5 just for that, well that, and the annoying music.
To get the hard badge, just upgrade to the machine gun, buy the "unlimited jumps" upgrade, and in survival, just keep pushing UP to stay off the top of the screen.
What I don't like is there are no tips on what makes a good bridge. Yes there is a section saying "building tips" but they only say what the things are, with no recommendations on how they should be used. I have no idea what makes a strong bridge and what makes a weak bridge.
To get to survival wave 40, just buy the unlimited ammo upgrade, put the biggest gun in the middle of the mushrooms, put a weight on your mouse button, then leave the computer for 10 minutes and go get a coffee.
 "Conveyor Belt Carl"){kind=icon}
 "Hello Worlds!"){kind=icon}
 "StrikeForce Kitty"){kind=icon}
 "Fracuum"){kind=icon}
 "Endless Migration"){kind=icon}
 "Coma"){kind=icon}
 "Cyberchase"){kind=icon}
 "Cyber Chaser"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Mushroom Madness 3"){kind=icon}
 "Wasted Youth, Part 1"){kind=icon}
 "Chronotron"){kind=icon}
 "Reincarnation: Riley's Out Again"){kind=icon}
 "Elephant Quest"){kind=icon}
 "Smash Carrera GT"){kind=icon}
 "Just Lemons!"){kind=icon}
 "Pause Ahead"){kind=icon}
 "Blob And Block 2"){kind=icon}
 "KFC Quest"){kind=icon}
 "Noob!"){kind=icon}
I haven't have had time to answer right away. I will indeed fix the bug!