Skybound 36

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 browser-based 2D vertical climbing platformer titled “Skybound 36.” Render the game on a full-window HTML canvas with a responsive dark sci-fi interface layered over it. The player is a small rounded astronaut/robot avatar, about 34×48 pixels, with a colored body, dark visor, highlight stripe, tiny side arms, and dark boots. The default skin is amber; include a persistent shop with eight selectable skins: Amber (free), Mint (15 coins), Coral (30), Violet (50), Solar (70), Ocean (85), Lava (100), and Pearl (120). Owned skins and selected skin persist between sessions using local storage.

The core game is a 36-level upward platforming campaign. Each level is a single vertical ascent through a themed sky, with the camera following the player upward. Start on a broad platform at the bottom and procedurally generate a chain of platforms above it, with platforms spaced for jumping. Levels become longer and more hazardous as they progress. Use deterministic seeded generation per level. Each level has a colored gradient background and matching platform/hazard palette, cycling through six themes: deep blue Moonrise-like skies, purple/rose Ember-like skies, teal Tide-like skies, brown/orange Canyon-like skies, blue Frost-like skies, and dark brown Dusk-like skies. Add sparse glowing particles/stars in the background.

Use platformer physics: left/right acceleration with friction and a capped horizontal speed, downward gravity, and a jump impulse. The player can double-jump, with the jump triggered by Space, ArrowUp, or W; move with A/D or the left/right arrow keys. Platforms are solid from above, reset the player’s jump count when landed on, and the player is constrained to the level width. Add responsive touch controls on small screens: hold buttons for left and right and tap an up-arrow jump button. The camera smoothly tracks upward, keeping the player around the upper portion of the viewport.

Build each level with normal solid platforms, and increasingly add special platforms. Some platforms move horizontally back and forth. Some later platforms are dropping platforms: when landed on, show a short countdown (about one second), then make the platform fall away. Place glowing gold collectible coins along the ascent; collecting one increments both the current-level coin count and persistent total coins. Place checkpoint flags periodically, approximately every fourth platform. Reaching a checkpoint changes its flag to a green reached state and updates the respawn point. If the player falls significantly below the current checkpoint, hits a hazard, collides with a diving bird, or is hit by a boss projectile, respawn them at the latest checkpoint and show a toast message such as “Obstacle hit — back to checkpoint.”

Add hazards on platforms: bright glowing rectangular spike blocks and, in later levels, saw-like hazards with a circular highlight. Some hazards can move horizontally. Add transparent outlined wind zones, labeled “→ WIND” or “← WIND,” that push the player horizontally and also provide an upward force while inside them. Their visual color differs by direction, and wind should have a subtle low electronic/oscillator sound when active. Add flying birds in later levels: pale stylized birds with outstretched wings that patrol horizontally. When the player is near, a bird telegraphs a dive with a dashed red line aimed toward the player, then dives downward and curves toward the player; contact causes a checkpoint respawn.

The top/final approach should lead through several connected platforms to a glowing finish flag. Reaching the finish at the top completes the level only if the boss, when present, has been defeated. Automatically advance to the next level after a brief “Ascending to next level” transition for levels 1–35. The final level, level 36, should have the status “Boss level · defeat the Sky Warden” and spawn the Sky Warden above the final platform. Draw the Sky Warden as a large glowing purple oval/creature with two pale rectangular eyes and a red health bar. It has 3 hit points. The player damages it by jumping into/contacting it, with a cooldown between hits and a small upward bounce; show a toast indicating remaining health. The boss periodically fires glowing pink circular blasts aimed generally toward the player; a blast hit sends the player back to the checkpoint. Once all three health points are gone, remove the boss and allow the finish to trigger. Show a “Sky Warden defeated!” message, then a “You won!” overlay explaining that the player is returning to the main menu; the final level does not automatically start another level.

Create a HUD matching a polished dark glassmorphism style. At top left show “SKYBOUND 36” and the subtitle “Dodge the obstacle rush.” At top right show “Level N / 36,” a status line such as “Climb up · avoid wind and birds” or the boss status, and “Coins: levelCoins · Total: totalCoins · CP checkpointIndex.” Use translucent navy cards with rounded corners, pale blue borders, shadows, and backdrop blur. Show centered rounded toast notifications for level names, coin pickups, checkpoint activation, impacts, boss hits, and transitions. Along the bottom provide buttons for Restart, Next level, Levels, Main menu, and Reset save. The Levels button opens a compact 6-column progress map with 36 numbered buttons; the current level is cyan, completed earlier levels are green, and each button can load its level. Include the bottom hint “A/D or ←/→ move · Space jumps twice” and mention the hazards. On mobile show only the touch controls and hide the hint as appropriate.

Start with a main-menu overlay over the game: title “Skybound 36,” description “Climb through themed skies, dodge hazards, and defeat the Sky Warden,” buttons for Continue, New run, and Reset saved progress, plus the skin shop showing the persistent coin total. Continue resumes the saved current level. New run starts level 1. Reset clears saved progress, coins, selected skin, and owned skins except Amber. Include restart, next-level, main-menu, level-select, and save-reset behavior. Use smooth transition overlays, rounded buttons, accessible touch/pointer behavior, and save current level, total coins, skin ownership, and selected skin after relevant actions. Keep the visual style as clean neon arcade art: flat geometric canvas shapes, glowing edges, bright collectible coins, saturated hazards, and dark atmospheric gradients. Do not add weapons, attack buttons, lives, or features beyond the movement, double jump, contact-based boss damage, collectibles, checkpoints, wind, birds, platforms, menus, and HUD described above.