[squad:plan] Quillfall M1 Prototype: falling slips and sentence validator (Fenster) #65845

Owner: Fenster

Tasks:

• Add quill input (mouse, touch, keyboard).
• Add slip spawning and fall physics.
• Add the template-based sentence validator.
• Add the ink meter and a debug overlay.

Done when one page is playable end to end with grey-box art.
Related to #65841

Generated by 🎮 Squad Game Planner · copilot · auto · 23.9 AIC · ⌖ 5.89 AIC · ⊞ 9.9K · ◷

• expires on Oct 6, 2026, 4:00 AM UTC-08:00