I think I did level 10 wrong, considering I finished with a time of 112:08. I just very slowly advanced towards the lower-right section with 24 blasters and 16 launchers, killing all the creeper in my path.
There really should be a way to remove a tree or rock on an island that is entirely covered with them so you can actually place things there. Also, you can place trees on the unbuildable worlds in the "Hacking Alien Tech" scenario.
I never bought any quantum foam upgrades on my first prestige since I thought I would lose the bonus from it when I spent it. It should be made more clear that you don't lose it.
Can we please get hotkeys for spells, and maybe also a hotkey for releasing zombies from cages, or at least a button for it near the spells? That would make releasing caged zombies as gigazombies so much easier, and also make it a lot easier to combo spells, too.
Something you might want to know: The number of loyalty points you gain when you change stores is equal to the square root of your card points when you prestige.
coin bonus and coin magnet are overall the most important upgrades for getting money, since if you use kongpanions to max out those two upgrades, you can get far more money than you would get without them.
 "Jelly Cannon"){kind=icon}
 "Creeper World 2: Academy"){kind=icon}
 "Idle Match World"){kind=icon}
 "The Final Earth 2"){kind=icon}
 "Naklejka"){kind=icon}
 "Yet another Merge Game"){kind=icon}
 "Absorber"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}
 "Defender Idle: New Beginning"){kind=icon}
 "Aspiring artist 2"){kind=icon}
 "Darts Idle"){kind=icon}
 "Incremancer"){kind=icon}
 "Idle Scratch-Off"){kind=icon}
 "Constructo"){kind=icon}
 "Hexologic"){kind=icon}
 "3 Slices 2"){kind=icon}
 "Curl Up and Fly!"){kind=icon}