Stacking your fighters to merge is actually hard to do. I tried to merge many of them & they just ended up forming a wall. There was also no way to get those fighters back in action.
Reviews for "Stacker War"
Isn't the third level a bit hard ? the enemy spawns tier 2 units before i can even spawn a single unit at all. And even later the enemy hordes are simply too strong. No time to combine units. And since the previous levels can't be farmed i don't see any way to finish level 3. I like the idea, but it seems a bit unbalanced.