🪐A blue ocean planet ringed by a glowing cyan defense ring, meteors approaching

PLANET GUARD

Orbital defense · Bullet-heaven · One-finger controls · Roguelite builds

spin to aim3 weapon systemsmeteor storms

PLANET GUARD flips the usual bullet-heaven formula: instead of moving a character through danger, your planet is fixed at the center of the screen and never moves at all. Meteors, scout drones and raider wings spawn around the rim of a warp tunnel and stream straight toward the core from every angle at once. The only thing you control is a thin defense ring that orbits the planet — drag to spin it, and whichever direction it faces is the direction that gets covered.

Weapons fire on their own once equipped, so the tension is entirely about positioning, not aim or reflexes. The Pulse Cannon only hits what's inside its narrow forward arc, rewarding constant re-aiming. Aegis Pulse and Orbit Beam work independently of the ring's facing, giving you a passive baseline while you focus the ring elsewhere. Every level-up pauses the action for a free three-card choice — a new weapon, a tier upgrade for one you already hold, or a passive tech module — and each option changes how a fight plays out, not just the numbers behind it.

Roughly every ninety seconds a meteor storm telegraphs its approach with warning arcs before dumping a wave of fragments from several directions simultaneously — clear it without losing shield and you're rewarded with a full recharge and a score bonus. A shield absorbs contact damage first, the core only takes damage once it's down, and a rare Phase Armor module can block one otherwise-fatal hit per run — so a loss always comes from a run of choices, not a single mistake.

How to play

  • Aim: drag left or right anywhere on screen to spin the defense ring toward incoming threats.
  • Fight: equipped weapons fire automatically — the Pulse Cannon needs the ring pointed at its target, Aegis Pulse and Orbit Beam don't.
  • Build: pick one of three free cards on every level-up to add a weapon, upgrade one you hold, or equip a tech module.
  • Survive: watch the shield and core bars, and clear meteor storms cleanly for a full shield refill and bonus score.

The game runs on plain Canvas 2D with a handful of AI-generated sprites and a synthesized WebAudio soundtrack, so it opens in under two seconds with no asset packs to download.

保护星球 PLANET GUARD 把常见的弹幕生存玩法反过来做:不是操纵角色在危险中移动,而是让星球固定在屏幕正中心,永远不动。陨石、侦察机与掠夺者编队从径向隧道的边缘生成,同时从四面八方径直扑向核心。你唯一能控制的是一圈围绕星球旋转的防御环——拖动屏幕即可旋转它,环朝向哪个方向,哪个方向就被覆盖。

武器装备后会自动开火,所以整局的张力全部落在"朝向"上,而不是手速或精准点射。脉冲炮只能命中它狭窄前向扇区内的目标,逼你不断重新瞄准;护盾脉冲与轨道镭射则独立于防御环朝向工作,让你在专注别处时仍有基础输出。每次升级都会暂停战斗,弹出免费三选一——新武器、已持有系的升阶,或一个被动科技模块——每个选项改变的是打法,不只是数值。

大约每 90 秒会有一波陨石雨,触发前有警示弧线预告方向,随后从多个角度同时倾泻陨石碎片——干净清场且护盾未破,会获得护盾全额恢复与分数奖励。护盾会先吸收接触伤害,核心只有在护盾耗尽后才会受损,稀有的相位装甲模块还能在每局挡下一次本该致命的打击——所以输掉一局,永远是一连串取舍的结果,而不是一次失误。

怎么玩

  • 瞄准:在屏幕任意位置左右拖动,即可让防御环转向来犯方向。
  • 战斗:已装备武器会自动开火——脉冲炮需要防御环对准目标,护盾脉冲与轨道镭射则不需要。
  • 构筑:每次升级从三张免费卡牌中选一张,获得新武器、升级已持有系统,或装备科技模块。
  • 存活:留意护盾与核心血条,干净清完陨石雨可获得护盾全满恢复与额外分数。

游戏基于纯 Canvas 2D 实现,搭配少量 AI 生成素材与 WebAudio 合成配乐,两秒内即可打开,无需下载任何素材包。