Pixel Squadron vs 回线：BACKTRACE

Five neon jets cut through twenty stages of pixel-art bullet hell. Eagle rains spread shot. Viper unloads rapid bursts. Titan drops heavy cannon rounds. Phantom slices with a continuous laser beam. Omega locks on with homing missiles. Pick a jet, learn its rhythm, weave through the wall. TEN BOSSES, FIVE WORLDS Atmosphere. Ocean Storm. Deep Space. Mechanical Fortress. Chaos Void. Each world hides a mid-boss and a final boss — ten multi-phase fights, each pattern built to read your thumb's habits and punish them. WHAT IT FEELS LIKE Thumb sweat. Screen-filling neon. The split-second between two laser walls. The bomb you save for the third phase. The drone that finally lines up your blind spot. DEPTH WHEN YOU WANT IT • 20 stages across 5 worlds, plus Endless mode that scales by your survival time • 13 enemy types in three tiers — normal, enhanced, elite • Bomb gauge charges with kills — release to clear the screen • Permanent upgrades: damage, fire rate, speed, bomb charge, coin bonus, option drones • Every upgrade earned in-game. Watch an ad to revive or double your coin drop — never forced. No timer, no paywall. If Sky Force taught you what an arcade shooter feels like, you're in the right room. Questions or feedback: support@hsiangyu.dev

子弹不会在去程造成伤害。真正的攻击，发生在它沿原轨迹归来时。 BACKTRACE / 回线是一款围绕“返程弹道”构筑的俯视角动作 roguelite。你只有六枚不会消耗的弹丸：把它们射向墙面，利用反弹布置未来的杀伤线；引诱敌人进入轨迹；在正确时机召回；最后赶回旧射击点，接住归来的弹丸并维持战斗节奏。 核心特色： - 独特的返程伤害机制：去程布线，返程穿透敌群； - 六枚永久弹丸：每次发射都同时创造弹道与必须返回的锚点； - 主动召回、相位冲刺、反弹、标记和接弹组成高密度战术循环； - 五波完整单局、四类敌人和多阶段 Boss“收债人”； - 九项围绕返程、反弹和接弹设计的局内升级； - 为 iPhone 与 iPad 横屏设计的双虚拟摇杆和快捷按钮； - 离线单机、无广告、无应用内购买； - 降低闪光、关闭震动、瞄准辅助和色觉符号等辅助选项。 先决定子弹将如何回来，再决定自己要去哪里。