Face-aware collision
Wall, brick, and paddle responses use distinct rules while preserving the documented speed magnitude.
Deterministic testsPlayable Systems / Core mechanics reference
Paddle and Brick
A compact collision laboratory with every required state and physics rule exposed.
- Version
- v0.1.0-core
- Tier
- Core mechanics
- Authority
- Human reviewed
Playable build
Launch only when you are ready.
The ball begins attached to the paddle. Clear the fixed brick field while preserving three lives. The game never starts itself.
- Left or A
- Move left
- Right or D
- Move right
- Space or board tap
- Launch
- Control rail
- Move paddle
Core gate: The collision and state contracts passed human review. Power-ups remain intentionally absent from this reference.
Score0
Lives3
Bricks40
StateReady
Drag to move
Keep your finger below the playfield.
Mechanics ledger
A direction change must have a reason.
The engine separates collision faces, preserves ball speed, and divides movement into substeps before drawing the next frame.
- Wall response
- Relevant axis only
- Brick response
- Face-aware
- Paddle response
- Up to 60° from vertical
- Motion
- 120 Hz fixed simulation
- Tunneling
- 4 px maximum substep
- Scoring
- 10 points per brick
Evidence ledger
Core capability before feature breadth.
This reference demonstrates how an implementation can satisfy a public contract. It does not promote a model or grant authority beyond this approved publication.
Five explicit states
Ready, playing, ball-lost, game-over, and won remain visible in the interface and testable in the engine.
No automatic startHuman-gated progression
The core build passed mechanics, interface, responsive, and human review before publication.
Publication approved
Attribution record
Implemented as a governed CardonaLab reference using the public Playable Systems contract. Brick art by John B. Marine, licensed under CC BY 3.0. Deterministic software verification and human publication authority remain separate from model output.