I can respect the fact that the developers are trying to make money, and this game is really awesome, but if you're getting money from add revenue it's little much to force players to pay-to-play (as you have done with the implementation of the energy bar).
Wow, very pretty game. Unfortunately, it's just as buggy as it is gorgeous. First off, speed boosts don't stack with rocket boost and also have the odd habit of slowing you down compared to rockets. When thrown backward, the game crashes, and sometimes the money you've been saving vanishes. Maybe you should have spent some time testing this out a bit more before releasing it.
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