Does this game have another aspect other than being a time waster?
This game is made of FAIL. Don't know why this "thing" has a rating above 2.0.
1/5 points from me.
Finished the game just now. Was not that hard after all. 2nd try total. You just have to concentrate your upgrades on one weapon and turrets of course.
Level 8 guide:
1) place red bombs above the outer green bombs.
2) make the lower green bomb a yellow bomb (by using a red on on it).
3) place a green bomb to the lower left of your yellow bomb.
4) take cover !
5) click the yellow bomb.