Refit available. Choose one.
Upgrades: none
Gun fires automatically. Reactor power is routed by hand.
← boosts Weapons, ↑ boosts Engines, → boosts Shields, ↓ frees a bar from whichever system has the most. Power comes from one shared reactor: a boost uses free power if there is any, otherwise it takes a bar from whichever other system has the most. You can also click a system's bars.
Overcharge: free bars fill the meter under FREE. When it glows, press the key of a system that's already full to push it one bar past its max for a few seconds.
Weapons fire faster (missiles too, once unlocked). Engines fly and turn better. Each Shields bar is one layer that blocks a whole hit, then takes time to recharge.
Your gun fires on its own at the nearest enemy in range. On a phone, touch and drag in the arena to steer.