Son1cb00m - spread your towers out so they can cover the corners. You'll need about eight - ten towers. I used very few traps. Mix gems with mixed gem ability.
Got the gem of eternity just now whilst I was level 59 :) quite pleased about that - did it on my first attempt as well. . .but only just! Stephen www.edenchanges.com
Loved it. Great artwork, logical puzzles and snappy dialogue between the two main characters. Recommended. Took me about two hours to complete and I did have to look up the walkthrough three times...okay four! I did get out of the ship on my own though! Sequel please! Rhymelord