Hints
Building up a reasonable-sized force before you attack the enemy is a good plan, especially on the harder difficulty setting, but don't forget to defend, too.
A lone scout backed up by a larger attack force will usually draw the enemy out.
Setting your planes to 'auto' means you can worry about other things while they fly their sorties.
Atlas is an action-rpg with rogue-like elements where you use your ability to control the ground to fight the enemies and move through procedurally generated worlds.