Amazing game! Haven't seen something that original in some time now.
Though the real challenge in the game is guessing what your symbol means and not how it looks like.After a couple of levels, drawing the symbol in your head is a easy, but guessing what \ how to name it is real hard .I personally had to translate a couple of words.
Private:" But general, how is one tank supposed to stop a whole army? Not to mention that we redirect ALL of our supply planes to it. And what does it mean 'it will regenerate health'?"
General:"Welcome to the real life private!"
Seriously the realism of today's games just amaze me.
A few tips to get to the higher levels (got to levels 30+ with this tactics):
1. The powerups cycle when dropped from a nest,allowing you to choose the powerups that you want, make sure that when you start the game you pick only power (fist) or shooting speed (bullets).
2.The nests drop as asteroids and make a shadow on the planet before impact, beware of them.Otherwise you will die instantly
3. At the higher levels the exploders (that will be black these levels) will always spawn from nests so make sure you kill the nests before you try getting rid of them completly.
4.When a nest is destroyed the part of the planet wich it were on is completly healed, use it to your advantage.
5. Try to use the invincible mode to finish off the last nests and exploders, and heal the planet by the way.
btw 5\5 ... awesome music, very original and nice graphics.
Got to 25 min at survival easy with this tactic:
Fireball, Sandworm, Skeleton , Reaper, Soul Jar , Confusion
Mostly you wont have to sweat because the reaper and the skeletons will work nicely.
Spamm fireballs, after you max it 3 fireballs spamm is great way to keep workers out.
Confusion helps to get rid of mass tanks and slows greatly and the jar will keep you mana up.
+ if this helped you anyhow