What makes it difficult is the inprecise controls. The fish follows the mouse at a fixed rate, and while scrolling through the level the scroll speed randomly increases for a brief second, meaning that tiny little dot you were aiming for is now too far behind/ahead, making it all the more ridiculous if you're out of sight in the air.
Tedious. Very very tedious.
2/5
Not that it's another distance game, but it doesn't even do it decently. Generic flash graphics, overused upgrades without introducing anything new, unique, or interesting, poor sound effects, gameplay is repetitious rather than challenging.
*sigh* "Juggling"? Really? It's a nice off-strategy if you have no other chance to avoid lifeloss, but a TD game PROMOTING it? I hate juggling because I would much rather lay down my master plan and watch it work, rather than force it to work through cheap trick.
Not challenging in the least, only part that was relatively funny was the ending, music is very bitty and repetitive, the fully upgraded graphics still made me think: "What, that's it?"
Now how is this such a highly rated game? 2/5. Neat concept of "you must buy everything", just not entertaining.
Tip for challenge 6:
First off, grab the ball and break one of the large orbs down (taking damage is ok, just not too much) into tiny orbs. Immediately after the orb breaks into small orbs, GRAB ALL OF THEM ON THE SAME SPOT ON YOUR GLUEFO. What this does is it allows you to focus all of your shots on a single orb, nearly breaking a large one all in one go. Shoot, then immediately grab them back.