Thank you very much for playing the game and the feedback!
I would have forget to use VELOCITY_MAX, no, I wouldn't... sight... I did forget. XD
The spawn is calculated based on player position, so you didn't pass the spawn area, you just pass through it before the enemy squads are completely generated (it's not just sprite and collision shape, I have to join the soldiers to each other and check the joints consistency, for a fluffy behaviour if you bump in them, my method is probably not optimal). Because, a part of the fun should be to crash into enemy squads, disperse them or slice the squads depending on the loot you get... But, obviously, it was unclear. XD