I would like to add a complaint about the developer, for lying about the removal of energy. It has been promised for ages. Every deadline broken without as much as an excuse even.
I didn't LOVE the game. Personally I like upgrades over powerups, and would like levels.
I personally think if that was done it would become quite a good game.
I found the game very amusing, played it all the way through, personally I felt that my tank closer to the end became surprisingly strong, as well as my castle could survive anything. (maybe the upgrades are too strong?)
Otherwise, I got all upgrades, played the game through, I rated it 5/5
 "Firmament Wars"){kind=icon}
 "Bandit Gulch TD"){kind=icon}
 "Doom Forge"){kind=icon}
 "Space Trooper USA"){kind=icon}
 "W-Zone"){kind=icon}
 "The Maze Game"){kind=icon}
The energy has been removed form the game