Levels that might confuse people:
4? (maybe)- Click and hold down at the bottom of the tree until it fully grows...
11- type key on your keyboard
14-Just shake the tree- A LOT
15- Not really confusing but a trick to beating it easily is to click down on the first guy and hold down the left mouse button until you get to the next guy. Hover your mouse over him for a second and the key should appear
18- Once the hole is next to the arrow: click
19- Right click with your mouse
20-Bring the globe all the way to the top then drop it
24- Same advice as 15 but a little trickier to pull off.
25- lol have fun
Wow I feel like an idiot. I had no idea you had a gun in this game. >.< That's why I couldn't beat that boss. Game=Easier than I orginially thought. And the people who say this game is hard probably aren't any older than 12, or else they would have had their fair share of platforming by now.
Best advice for anyone trying to get the impossible badge is to go Bio. I tried psychological and got stuck in zone 5. Then I switched to Bio and got it done easily