I cannot recommend anyone start playing this game. Lost my save after reaching lvl 50+ and mine level 5. This is unacceptable, especially when combined with the complete lack of developer attention after the release of the game and the plethora of basic issues detailed in previous comments (most importantly, lack of in-game information on the effects of different actions/skills). Shame, since the basic concept and implementation is actually fairly clever, but realistically there simply is no future to this game as it stands and any time spent on it is just wasted.
Finally got the last badge, this game has offered hours of fun! The levels offer a lot variety and just the right amount of challenge. Imo juggling is a part of td's and it really isn't necessary for that many levels anyways.
The AI could really use some tweaking, though - I don't know what algorithm the towers currently follow to hit creeps, but they make pretty serious mistakes way too often. Increasing the emphasis on creeps closest to the exist would help. I had to replay especially the last tier or levels several times through since ghosts would slip by because of this.
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 "Bubble Tanks Tower Defense"){kind=icon}