I presume we're talking about "Starter Pack" and not "Soko Trolls"
Here are hints and (hidden) solutions for levels 2, 4, and 5 (highlight the text to see it)
Hint: Alternate your attacks between the Warlock and Vampire
Solution: Attack the Vampire, attack the Warlock, use your potion, kill the vampire, kill the warlock, kill the meat man, kill the zombie, victory
Hint: You've got plenty of PISORF power, but very limited health; figure out who you will need to attack and who you can be dealt with only by blasting them into walls.
Solution: PISORF the goat, attack the goat, grab WEYTWUT, swap places with the zombie, convert WEYTWUT, PISORF the goat twice to kill it, PISORF the second goat twice to kill it, PISORF and attack each goblin once, now kill the level 2 goblin with melee attacks, victory
Hint: Petrify weaker enemies, fight stronger enemies
Solution: Petrify the goo blob, kill the gorgon, petrify the the goo blob, kill the gorgon, petrify the zombie, convert IMAWAL, kill the meat man, kill the dragon, victory