i love to play lily padz, adn i play it a lot. so here is what i found out
1) if you finish all 5 levels will all of your lives, you will only get about 50-60 kinzcash (depends on how much flies you eat!)
2) so, if you perposly mess up at the last possible minute, you will do-over the level and get more kinzcash!
*HELPFUL TIP*
i would saylose 2 lives in level 4, 1 in level 5, and you will have 80+ kinzcash AND..... it only takes about 5 MINUETS
WARNING
the 'perposly losing lives' thing is HARD! you need to at pretty sure that you won't lose more than 1 life, or else you won't get as much kinzcash
but try it if you want to!