If you have a good game people will donate. If you think you have a great game then sell it. Either way don't make an energy scale that is so quickly depleted. If I wanted that I'd play one of those Zynga facebook games.
I'm amazed that this came from the same people as Bubble Tanks 2, a much better game. The pace of this is really slow, upgrades take too long, and the challenge takes forever. The editor messages last way too long as has been said.
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