Good job on creating a game that makes the user want to keep coming back to play; if you want to turn this into a #1 game on Kong though, you need to give the user something to be doing while they are waiting for their energy to charge back up. Perhaps you should add in a method of returning energy quicker that does not include the user/player paying physical money. You know, there is a massive amount of money to be made in advertising, don't let your game fall short of its potential because you are trying to ignore this.
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