@HandofPestilence Get some good air and go upside down, stay there then right yourself before you hit the ground. Click hints and tips for a full list of "stunts".
Upgrading minigames increases the firing speed in Pizzaroids and how fast the fish can move in FishiBishi. I'm not sure what it does for Lava Palava; I'd guess it makes the player move quicker, but I didn't notice much difference.
Asteroids. Why did it have to be Asteroids? All the minigames in the world and it had to be Asteroids? My hate for the game is undescribable...and yet, the fish must be acquired.
Try quickly switching your focus from game to game instead of trying to think about them all consecutively. Also, put your right hand over WASD+Shift+Space as if you were playing a first-person shooter
Red: The ball can sit where it starts for a while before you have to start rebalancing (relevant for switch). After that, this one takes priority.
Pink: You can let the arrow sit at the bottom of the screen until one comes along you need to press space for.
Green: You don't need to collect them at 10. The time limit lets you give this one lower priority.
Purple: In switch, jump early. This takes second priority.
Yellow+Blue: These both have a time window before you need to react, use it.
Just some things that helped me trying to get today's badge.
 "Cell Warfare"){kind=icon}
 "Shopping Cart Hero 2"){kind=icon}
 "CycloManiacs 2"){kind=icon}
 "Electric Box 2"){kind=icon}
 "Spectromancer: Gamer's Pack"){kind=icon}
 "A bark in the dark"){kind=icon}
 "Wake Up the Box"){kind=icon}
 "Multitask 2"){kind=icon}
 "Knightmare Tower"){kind=icon}
 "Factory Balls"){kind=icon}
 "Potty Racers 2"){kind=icon}
 "GemCraft"){kind=icon}