Level 22 tip(kill 2 enemies with all weapons): It's not hit 2 enemies with all weapons before killing. You must kill at least 2 enemies with every weapon - 2 with chainsaw, 2 with quicksilver, 2 with twister, etc. etc.
First of all there is multiplier to each level. So how in the hell I can grind my stats when it drop to 0,25?! Also some levels are extremely hard - without right weapons. I loose all time against humanoid enemies. And third thing - dashing is not-maneuverable -> player lot of time dash in wrong way. In total 2/5. Sorry, there is some stupid things, that make game un-cool.
Hard badge without monkey help: Gold cart, all groupies, winged hat. Aim for perfect jump, then make "up-n-out flip(first)" and all 3 other air tricks. Then make handstand, or if you aren't in space - make glider and then handstand. keep it to raise score(handstand are better than superman) and land without pole vault. With little skill and luck you should get around 20000 trick points and with cart+groupies+hat multiple it by 2,6. I've got 60000 total points with trick multiplier at 6(haven't hit space ship and forgot to make spin ;P) Enjoy, it's easy badge, just require time.
How to make lot of skill point? Easy: Repeat killing giant enemies. Destroy enemy first and then attack monster with spells and finish with horse riders =] I used blind+sudden death mode = over 20000 exp per scorpion map ^^
Easy way to make hard badge: Maximize bomb bonuses, place some slow towers(or not^^), send ALL enemies at one time and spam them with bombs ;D Funy as hell ;P
Finally! I got last badge! Most boring, annoying and bad game ever! I've never before player piece of s.hit lite this game! Only for badges ^^ See ya' guys!