Really good game, haven't played a chain reaction game in awhile, just needs more upgrades, harder difficulties, and maybes a change of background as you advance through with bigger spaces / less fireworks?
Guys just realised something that may help :) if you're finding it really tough (which i am on hard mode past 650 since i cant make lots of turns) try upping the sensitivity ;) means u have shorter turning circles :) (you can do that in the options at the main screen btw) good luck!
For final boss on epic (the white ape) just use normal troops with the highest attack (not the titans) and use invincible (should be on highest level) (also getting mana pool on highest level increase mana regen rate aswel :))
You should create a one but add alot of difficulty on it such as using mouse clicks or different letters which are randomised to my recall theirs only one game which has even done this properly before and it was great