Starfall Gauntlet

Cinevva's analyzer read this game's design doc and its source, then wrote the brief below. "Make your own" hands it to the game creator as your opening message, so you start from a real spec rather than a one-line idea.

Create a playable game titled “Starfall Gauntlet”: a fixed-camera 2.5D top-down bullet-hell shooter in a sci-fi neon arena. Use Three.js or an equivalent 3D engine with a perspective camera positioned high and angled toward the arena (roughly at x=0, y=16, z=13.5 looking at the origin), so sprites appear as flat 2D space-shooter art floating just above a 3D floor. Keep the view centered and do not make the camera follow the player. The visual style is dark navy/black space with cyan and magenta neon lighting, glowing projectiles, cyan wireframe/grid lines, and translucent futuristic HUD panels. Use Kenney-style CC0 space shooter sprites for the player, enemies, lasers, powerups, shield aura, explosion/flame effects, and meteors; add sci-fi docking-deck and laser-gate props around the arena if available.

Build a rectangular glass-like combat arena spanning approximately 20 units wide by 14 units deep, bounded by bright cyan electric lines. The floor is dark blue and semi-transparent with a cyan grid. Add a thin magenta warning ring in the center and a larger cyan ring, distant stars, and a few dim meteors in the background. Place sci-fi corridor/docking deck props beyond the north and south edges and laser gate props beyond the left and right edges. The player is a small blue sci-fi ship near the lower/southern side of the arena, with a subtle hover bob. Movement is controlled with WASD or arrow keys, clamped inside the arena. Start on a title overlay; pressing any key or clicking the arena launches the run.

The player has 5 hull points, a circular collision radius around 0.36, and can continuously fire while Space, the mouse button, or left click is held. By default shots travel toward the top of the arena; when using the mouse, aim toward the mouse’s projected position on the arena floor. Fire blue/cyan laser sprites at roughly 15 units per second. Power level I fires one shot, level II fires two with a small spread, and level III fires three in a wider spread and fires more quickly. The player can press Shift to dash in the current movement direction, or straight upward if no movement key is held: make it a short burst lasting about 0.15 seconds at high speed, with invulnerability during the dash, a 2.6-second cooldown, and a cyan particle burst. The player briefly flickers while invulnerable. Colliding with enemies or enemy bullets removes one hull point unless currently invulnerable or shielded. On death, stop play and show “SHIP LOST,” the score, and a restart button; R or Enter should also restart.

Implement four sequential encounters, with the HUD showing the current wave as 1/4 through 4/4. Wave 1 is “Sentries”: spawn seven blue scout enemies in a row just beyond the north edge. They move into the arena and fire aimed tri-shot patterns: three slightly separated pink/red bullets aimed at the player. Each scout has about 4 HP and awards about 110 points. Wave 2 is “Crossfire”: spawn five red lancer enemies from the left edge and five blue scouts from the right edge, distributed vertically. Lancers use five-shot fan attacks aimed toward the player; scouts continue aimed tri-shots. Lancers have about 6 HP and award about 150 points. Wave 3 is “Vortex Guard”: spawn six green orbiter enemies from the north and four lancers alternating from the left and right edges. Orbiters fire rotating rings of 14 pink bullets, while lancers fire their fan patterns. Orbiters have about 5 HP and award about 140 points. Enemies should drift toward target positions while gently moving, and enemy contact damages the player.

After all three ordinary waves are cleared, display a short “BOSS INBOUND” transition and spawn one large dark Prism Dreadnought boss, centered near the north edge. Give it 220 HP, a visible boss health bar at the top center labeled “THE PRISM DREADNOUGHT,” and award 2500 points when defeated. The boss moves horizontally back and forth across the upper arena. Its attacks must change by HP phase: above 66% HP, emit rotating rings of 20 bullets plus a three-shot aimed spread; between 66% and 33%, emit opposing seven-shot lateral fans and a rotating ring of 10 bullets; below 33%, emit a more intense rotating ring of 28 bullets at alternating speeds plus a five-shot aimed spread. Use bright pink/red enemy laser sprites. When the boss dies, clear the run and show “RUN CLEARED,” the final score, and the restart option.

Enemies and bullets should be removed when destroyed or when leaving the arena. Player lasers deal 1 damage and disappear on impact, while enemy bullets deal 1 hull damage. Add brief glowing flame/particle bursts for firing impacts, dashes, damage, enemy destruction, and victory/defeat. Keep collisions based on simple circular distances in the arena plane. During wave transitions, remove remaining enemy bullets, briefly show “WAVE 2,” “WAVE 3,” or “BOSS INBOUND,” then begin the next encounter.

Enemies can randomly drop one of three rotating/floating pickups on death (boss should always drop one): a red bolt that raises shot power by one up to III for 18 seconds and gives 50 points; a blue star that grants a 9-second shield and gives 40 points; or a yellow star that gives 450 points. Show the shield as a glowing cyan shield sprite around the ship and let it absorb incoming hits while its timer counts down. Play simple laser and power-up sounds when firing and collecting items, if audio is available.

The HUD should be an upper-left translucent dark panel with cyan border/glow and the title “STARFALL GAUNTLET.” Show Hull with a cyan/green bar and numeric value, Dash with a cooldown bar and “Ready” or seconds remaining, Power I/II/III, Shield seconds, Wave and Score. On the right, show compact controls: Move WASD/arrows, Fire by holding mouse/left click/Space, Dodge Shift, and a note about collecting stars and bolts. At the center, show the initial overlay with “STARFALL,” “Survive three waves, then break the boss phases,” and “Press any key or click the arena to launch. Hold Space or mouse to fire. Shift dashes through danger.” In a lower corner show “Fixed 2.5D camera · Neon bullet patterns.” Make the interface responsive, hiding the help panel on narrow screens while preserving the core stats and boss bar.