[squad:plan] Tidewright: tide-timed sandcastle defense puzzle game plan #66113

Concept

Tidewright is a small single-player puzzle-strategy game. Each level is a beach tile grid. Before the tide comes in, the player shapes sand into walls, moats, channels and towers to protect a fragile "heart shell". Then a deterministic tide simulation plays out, and the shell either survives or it doesn't.

• Platform: browser (HTML5 canvas/TypeScript), desktop and mobile touch. Static hosting on GitHub Pages.
• Art/style: soft paper-cut dioramas, warm sand palette, hand-drawn foam, chunky readable shapes. Colorblind-safe water and sand contrast.
• Core loop: inspect level and tide forecast → spend a limited sand budget → sculpt → press "Tide" → watch the replay → retry or earn stars for sand saved.

Minimum viable feature set

• 12x12 grid with sand, water, rock and shell tiles
• Deterministic tide/erosion simulation (fixed seed, no randomness)
• Sculpt tools: raise, dig, smooth, with a sand budget
• Win/lose evaluation, star rating, undo, restart
• 12 hand-authored levels, a tutorial and local save of progress

Milestones

Workstreams and owners

• Design and architecture: Keaton (Lead)
• Simulation and gameplay engineering (M1-M3): Fenster
• Build, CI and deploy: McManus
• Testing (determinism, solvability, playtests): Hockney
• Art direction, tutorial and docs: Verbal
• Security and privacy review: Kujan
• Responsible-AI/content check: Rai; claim and asset-license verification: Fact Checker

Sub-issues are linked below.

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• expires on Oct 7, 2026, 4:00 AM UTC-08:00