To get a perfect launch every time, right click so the game goes into slow motion and click right on the perfect launch time
At least, this works for me on Firefox.
You need to add more things, like moons. I am also surprised that my planet 5x the sun was destroyed, and that comets aren't interactive, besides driving them into your hard-worked planets and the sun..
If you want a great combo, put a rocket launcher and two cannons together. Upgrade their damage all the way and the combo will be nukes. Your turrets will shoot big nukes, little nukes, and nuke mines.
Here's a tip. Once you get to level 4 or 5 and unlock Gold Depository, you will get $15,000 for successfully completing the mission. Hire at least one of the higher Patsies and the mission will surely be completed.