Thank you ! Great to read. You're right, with more time it's the next thing I would've done. Instead I buried the informations at the bottom of the game page, lol
I'll write it here again in case somebody sees this :
Hull = health points (1 > 3 > 5)
Engines = speed (400 > 650 > 900)
Thrust = turn speed (2 > 4 > 8)
Barrel = bullet speed (from slow to fast, don't remember the details)
Caliber = bullet size (1 > 2 > 4)
Turbo = boost cooldown (5 > 2 > 0.2)