First-Version Game Plan / One-Page GDD

Project name:
One-sentence concept:
Target players, platform, and play context:
Core loop (action / feedback / next decision):
Gameplay hypothesis this prototype should investigate:
First-version scenes, characters, and content:
Out of scope:
Input methods and viewport sizes:
Scoring, misses, win/loss, and ending conditions:
Restart and state-reset rules:
Adjustable parameters and initial values (mark untested values):
Placeholder assets and essential feedback:

Rule checks (ID / action / expected result / device and version / actual result):
G1:
G2:
G3:

Playable milestones and completion criteria:
1:
2:
3:

Open questions:
Playtesters, observation goals, and questions:
Feedback notes and the next adjustment:
Update date and rule changes: