I know this is a real time game but it will be great if were a speed up buton when you attack somebody. It's, sometimes, boring see your monsters destroying a wall (example)
BTW, i saw the Facebook version and i think it's a little better and you can choose language. We need that too.
When you reach the rainbow and all units you can easily win, don't try to get gold medal before that. Try to reach all units hp, auras and rainbow. For not fog/holy (except last castle, in my case) use turtle, turtle, priest, golem, goblin x4, priest, golem, goblin x2. If there is a fog or holy you may use: turtle, turtle, priest, warlock, goblin x4, priest, warlock, goblin x2. I made that in every stage except the last one, there is just 1 fog tower and no holy, so you can easily stun it and heal your army whit Heal Spell (Of course, if you have heal spell maximun as mana recharge and mp+)
It's not to difficult. Just lvl up and buy Quick Learner and Businessman, repeat 3 times in that order. Later Regeneration and/or Repair then what you want. Buy new weapons but not everytime you have the money, i just bought revolver, winchester, ak-47, striker and minigun.
I played the ranger, is great. Have runes for everything, include go faster. stun melees, cast stop magicians (really nice when they heal thenself), and more.