so: (1) you have to kill clusters of enemies, (2) you have to pick up their remainders that fade away in a few seconds and (3) you have to survive. I'm quite close to say I hate this game. Too much things to do at once.
Normal mode, I died in wave 969 on out of memory. I was already thinking about giving up on wave 1000. Good thing the resources and gems are saved on a regular basis, I was slightly afraid I lost it with the crash.
The defense tree, though, seems fairly useless. Even upgraded in workshop, it would probably be much less useful than the offensive tree. I tried to put some resources in it during a game only to realize I can't keep up with their dmg and I'd get one-hit anyway, so 10 hp must be enough.
One thing I kinda dislike is how you basically invent stronger enemies by doing science. And the worst idea is to do the "universal" upgrade - that creates an enemy that is immune to everything but dmg. If only I could un-invent it just to watch how much can I do against white blocks.
Think! Think fast! Oh, and do it against the clumsy controls. That is what I don't like about this game - it is too much about the speed, both score and time bonus. Prizma Puzzle Challenges evolved in the right direction.
Other than the words starting with QUA, there are some larger list I made to beat that crazy Q-X objective:: -ELY:
I think Kajenx is right that strategy is a major factor. However, I think he underestimates the randomity. Sometimes you are on a spell streak and some other times, it seems you can't make even a single one without wasting some more moves to prepare it. And since there is a limited amount of moves, randomity can be a major factor.
With so many enemies around, I think they should have limited range (and I wouldn't mind if I had too) - it is really weird dodging infinite range cannonballs while being surrounded by so many enemies. 4/5 because of this gameplay issue that made it a bit less enjoyable, the music is however epic, especially the thing in the grand finale - couldn't really be more awesome.
The tutorial takes control of the game for too long. I have no freedom of decision for first ten minutes, then it only lets me to decide in the battles and no control at all over the world, not even clicking options. A game that takes its player for an idiot is not worth playing, bye.