forked from tas/major_tom
Jetpack charges now take 30s to passively recharge (up from 3s), making fuel management a core gameplay loop. A new fuel canister powerup (POWERUP_FUEL) restores exactly one charge on pickup. The existing jetpack powerup remains as the rare full-refill + 15s boost. Fuel pickups replace most procedural jetpack spawns at higher spawn rates to compensate for the weaker per-pickup value. Fuel canisters also appear in corridors and arenas. Adds orange canister pixel art, editor icon, entity registry entry, and places fuel pickups throughout moon01.