I am fairly new to godot (started with 4.2) and i really enjoy it! Thank you for the feedback. I want to expand on the game idea an single selecting a unit is a really good point.
Yes, that's a pity. Unfortunately, the Attackers' target recognition is not good. Sometimes you have to manually bring them close to the enemy until they start shooting. I alreaddy fixed it, but not in time for the jam :(