If you want to play more than 1 chapters of Elephant Quest, here is what I think: Wooly spawns 10 Zippers, it is EXTREMELY important to kill them because they have 10xp and he spawns them often.
You protect Baron Von Bratworst in the second chapter because he can't protect himself, how does he survive? Does he get money for researching the zombies, and then he sneaks in the garage and buys is own weapons?
2 reasons this game is not cool... 1. There is a glitch where you can't move (if THAT happens in a combat area you can't attack so you'll get beat to death) or it freezes at some point. 2. You can't craft multiple items at a time, like 10 potions.
Are those pesky Handkensteins and Handminators hard to kill? If you're a Commando, and you have the Assassin skill for your knife, swing it and it will kill them instantly. Non-commandos, well... use lots of pistols and use your best firepower.
Suggestion: Instead of just multiplying enemies health on high difficulty, why don't you also increase the exp? Casual: 100% Normal: 130% Hard: 160% Challenge: 200%