Momentum, not snapping
Acceleration and friction shape horizontal motion. Holding jump extends height only within a fixed window.
Playable Systems / Tier 2 review build
Foundry Run
A fixed single-screen platformer for measuring movement, collision, state, and correction quality across CodeForge versions.
- Version
- v0.2.0-review
- Seed
- 2408
- Authority
- Human review required
Movement laboratory
Recover all six markers.
Acceleration, friction, jump duration, coyote time, one-way platforms, enemy patrols, and explicit player states are part of the public contract.
- Left / A
- Accelerate left
- Right / D
- Accelerate right
- Space / Up
- Hold for higher jump
- Enter
- Start
Review boundary: This is a deterministic reference build, not a promoted model capability claim.
Score0
Lives3
Markers0 / 6
RunReady
Playeridle
First run: Use the D-pad to move. Hold Up or A for a higher jump.
Deterministic evidenceRun receipt
- Result
- Pending
- Score
- 0
- Duration
- 0.00 s
- Inputs
- 0 changes
- Digest
- Pending
Public contract
What the review build exposes.
Each mechanic has an observable state and a deterministic test. Visual approval and model promotion remain separate human decisions.
One-way structure
Players pass upward through platforms, land from above, and remain blocked by exposed sides.
Named transitions
Idle, running, jumping, falling, and dead remain explicit alongside run-level states.
Review before promotion
The model may propose the build. Deterministic checks and a human decide what it proves.