For me, the first 5 levels were hard. Once you unlock the Chief (Thor, the hammer dude), focus on leveling him up first. Use ALL Chief units and 1/4 Barrel Units (to give +% damage for some time) for an easy win. I beat the boss (skipped a couple islands) at level 27 with max level Chiefs (level 25) and level 16 Barrel Units (I used 7). Happy badge hunting!
Had a lot of trouble fighting the Kraken. I ended up using 6 Final Tech Armors, 2 Final Tech Boots, and 3 Final Tech Protectors with the Mustard Pro Medic Suit (Grants shield 3). The kraken has 3 eyes and only 1 will be open at most. Step on the red button on the platform to fire at the eye (that's the only way to deal damage. It's basically an endurance run. Good luck! :)
Making my 2nd run through right now. Helpful tips: 1) Always upgrade defense if you're given the option. (upgrading defense will make your enemies do minimal or even 0 damage early in the game). 2) Learn to enchant; enchanting is basically giving one of your equips a bonus (only several abilities apply, such as HP/mana regen or bonus attack). You can only enchant at a furnace by using an item and a crafting material (crafting materials show which kind of bonuses they provide and have a 100% chance of success unlike some games). Purple slimes drop HP regen, which are amazing in the first (at least) 30 floors. Also, it’s recommended to enchant only artifacts. 3) The upgrade path I find best at the start is the bottom right (provides +XP and defense). 4) For the sake of self pride, the museum (left of entering the cave) is a display for the artifacts you've collected. It holds one of each artifact, so don't sell your artifacts unless you already have one in the museum! Hope it helps :)
i was playing around on challenge 2/18 (february 18th) and decided to upgrade a Temple of the Monkey God with both upgrades of each tower sacrificed. i was disappointed at wave 91. :(