The instructions should be a lot more clearer. It took me about 20 days before I got the hang of this game. It should be that frustrating to learn how to play it.
A few bugs... after an attack is over sometimes some of my minions would run off the screen to the left as if going after an attacker but there would be nothing there. They wouldn't return until I clicked on my base. Also, buying the sweatshop factories didn't increase my income at all.
The best piece is the sniper with extra range. It can kill the enemy snipers without getting hit. If you can keep yours from getting killed, after a few rounds you will have a wall of unstoppable snipers =]
My high score went from about 5000 to 97000 after one game. After beating the last boss for the first time, I beat it like a dozen times in the next game. Once you have enough money to buy the best ship and all the bonus power ups plus the strongest weapon, it's almost impossible to die.
And I just beat level 3! Here's a hint: There's one balloon in each corner that you can't move. And also, you don't have to jump over another balloon to move. Once I realized that it became a lot easier! =]
I figured out level 2. Took me about 20 minutes and a little trial and error. A hint could be that notice how the green squares on the left look different than the other colored squares. The green ones are shapes the others are colors. To be fair, there are a number of solutions that would fit the hints, so you have to try them all until you find out which is the right one. And there's no clue for the center square.