To beat the hijinks challenge use all your boost on that slope right before the boxes. This will cause you to fly on top of the boxes and allow you to get the 1k+ easily. upvote so others can see.
To beat the whole game easily just stack gold and use monsters that ONLY use gold. You can beat w/o grinding for boosters. Also make sure when you face hard battles to start out with 3 or more gold mines.
Metagame near the end was extremely boring and just nonstop laser + plasma spam, no skills required to aim anything, sometimes the laser will do an insane amount of damage sometimes almot no damage at all.
How to kill first boss:
you don't need to use platforms or yellow guy.
Put ice block when blue targets prompts, this is when you are before him right before he grounds pound. Put the block and MOVE BACK. He will slam and hit block. Then red target will appear at his back. Switch to red and blast him. repeat 2 more times.
To beat final challenge in epic, use strongest full upped units. DO NOT USE TITANS spawn too slow. Charge the three horse heros right when they load. Make sure you have full upped shield. Right when the boss spawns use shield to protect ur heros. If they are under his foot and he keeps hitting forward they will b safe. Keep the waves coming nonstop to distract him while you take down the castle.
 "Hook"){kind=icon}
 "Min Hero: Tower of Sages"){kind=icon}
 "Giants and Dwarves TD"){kind=icon}
 "Esgrima 2"){kind=icon}
 "Earn to Die"){kind=icon}
 "Cargo Bridge 2"){kind=icon}
 "Zening"){kind=icon}
 "Johnny Upgrade"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Lab of the Dead"){kind=icon}
 "Town of Fears"){kind=icon}
 "Nick Toldy and the Legend of Dragon Peninsula"){kind=icon}
 "Dead Metal"){kind=icon}
 "Battle Beavers"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Cardian"){kind=icon}
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 "Primary"){kind=icon}
 "Epic Battle Fantasy 3"){kind=icon}
 "Epic War 4"){kind=icon}
Fixed!