Party games
It takes 2,500 play points to unlock a party game. The best way to rack up quick points is to play challenge mode. Play the Beginner level a few times without continuing to earn extra stages that will help your score skyrocket.
Bonus levels
Select the beginner difficulty setting and complete all ten levels in World 1 without using any continues to unlock 10 bonus beginner levels. Select the advanced difficulty setting and complete all thirty levels in Worlds 2 through 4 without using any continues to unlock 10 bonus advanced levels. Select the expert difficulty setting and complete all fifty levels in Worlds 5 through 10 without using any continues to unlock 10 bonus expert levels.
Master difficulty setting
Select the expert difficulty setting and complete all fifty levels in Worlds 5 through 10 and the ten bonus expert levels without using any continues.
Master bonus levels
Complete all ten master mode levels without using any continues.
Secret Area in Monkey Dogfight
Go to Monkey Dogfight and set it to survival mode(so you'll have plenty of time). Choose the Space Monkey Wars level. Fly down until you reach the floor. Then fly into one of the ditches in the floor. Then while staying on the ground in the ditch fly straight through the wall. You should be in a big pitch black area outside of the arena. If you fly to low you'll hit a big pool of water.