Crimson Line

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 compact 3D tower-defense game titled "Crimson Line". Use a Three.js-style real-time 3D scene viewed from a slightly elevated, mostly front-facing perspective: a dark blue/purple arena with a large circular rocky-looking ground island, soft fog, shadows, and a gently drifting camera. A glowing crimson/magenta lane is a thick curved tube/road running diagonally from the far-left/front side through the middle and toward the right/rear endpoint. Add short pink luminous lane stripes along it and scattered dark purple/blue crystal shards around the outer edge.

The objective is to defend the lane from corrupted red orbs. The player begins with 
80 cash, 20 lives, wave 0, and a Calm threat status. There are six fixed empty deployment platforms near the road, each a low dark-purple circular pedestal with a pulsing bright pink ring. The player selects a unit card in the HUD, then clicks/taps an empty glowing platform to deploy that heroine; clicking a platform occupied by a unit should show an occupied message, and attempting to buy a unit without enough money should show a not-enough-cash message. Each platform can hold only one defender. Deploying Scarlet Rifle costs $60; deploying Vesper Cannon costs 
00.

Represent deployed defenders as small stylized low-poly/anime-inspired heroines made from simple 3D geometry: pale face/head, colored hair, dark fitted suit/jacket, a pedestal-like lower stand, and an oversized glowing gun held forward. Scarlet Rifle has pink hair accents, a dark navy suit, and a cyan-blue gun muzzle; she fires quickly and reliably. Vesper Cannon has purple hair accents, a very dark suit, a larger gold/orange cannon and red-orange muzzle glow; she fires slower, hits harder, and has splash damage. Units automatically find the farthest-progressed enemy within range, turn/aim toward it, and fire automatically. Show bright muzzle flashes and glowing projectile spheres: cyan fast projectiles for the rifle and larger gold/orange projectiles for the cannon. Add brief expanding translucent hit/explosion effects.

Enemies are corrupted floating crimson orbs that travel along the curved lane from its start to its end. Build them from a dark red glowing spherical shell, a hot pink/red glowing core, and four small radial spikes; make them bob and rotate as they move. Each enemy has health and increasing strength by wave. A wave spawns 6 + (wave number * 2) enemies, with a short interval between spawns. Enemies move continuously down the lane; if one reaches the endpoint, remove one life and display a warning. Defenders earn cash when enemies are destroyed. Scarlet Rifle has range 4.5, damage 16, fire interval 0.38 seconds, and projectile speed 13. Vesper Cannon has range 5.1, damage 38, fire interval 0.9 seconds, projectile speed 9, and splash radius 1.35. Enemy base health is 44 plus 16 per strength level, speed is 0.038 plus 0.0035 per strength, and kill reward is 
6 plus $3 per strength. Preserve the visible fast glowing combat and small impact bursts.

The game has a touch-friendly glassmorphism HUD over the scene. At the top-left, show four dark translucent rounded stat chips labeled CASH, LIVES, WAVE, and THREAT, with large values such as 
80, 20, 0, and Calm. At the top-right, show a pink Start wave button and a blue 1x speed button. Start wave is disabled while a wave is active, while paused, or after game over. The speed button toggles between 1x and 2x and affects spawning, movement, firing, and effects. Near the bottom/side, show a translucent message panel with instructional/status text. At the bottom, show two large selectable shop cards: "Scarlet Rifle" with "$60" and "Fast shots, steady range, reliable early defence." and "Vesper Cannon" with "
00" and "Slow blast rounds, bigger hits, red burst splash." Highlight the selected card with a gold outline.

On first load, pause the game behind a centered dark translucent introduction modal titled "Crimson Line". Include the text: "Anime-inspired heroines with oversized guns hold the lane. Keep the style fierce, the action fast, and the damage flashy." Then explain: "How to play: choose a unit, tap a platform to place her, then hit Start wave. Survive every push down the road." Include a pink Deploy button. Deploy closes the modal and enables placement and waves. The status message initially says to pick a heroine and tap a glowing platform.

The player manually starts each wave with the Start wave button. Increase the wave number when started and display messages such as "Wave N incoming — hold the lane." When all enemies and pending spawns are cleared, stop the wave; if wave 6 was cleared, show a game-over/victory modal titled "All Clear" with text that the heroines held the road and the cleared wave. If lives reach zero, stop the game and show a defeat modal titled "Line Broken" explaining that too many enemies reached the end. Both end states should offer a Restart button. Use dark navy backgrounds, magenta/crimson emissive accents, cyan and gold weapon effects, rounded translucent panels, soft shadows, and responsive desktop/mobile pointer or touch controls. Do not add unrelated mechanics, enemy types, upgrade trees, or extra screens.