If you put your first two generators right next to each other, their output crystals will get stuck between them. Never reach the beacon, then despawn, without giving you any resources. Nearly softlocking the game (some will randomly spawn on the other side and give you some income).

Edit: nvm there was a refund button I missed. But still, less than ideal that when they force despawn you don't get the income from them.

Good game, but attackers are no where to be found.