Pure state transitions
Movement, collision, rotation, row clearing, scoring, seed replay, hold behavior, ghost projection, and restart are isolated from the interface.
13 deterministic testsPlayable Systems / CodeForge-built reference
An original falling-block puzzle with its engineering evidence exposed.
Playable build
Move, rotate, and place each block. The same seed produces the same opening sequence, making engine behavior repeatable.
LeftRight Move
Up Rotate
Down Lower
Space Drop
C Hold
P Pause
R Restart
Choose a control, then press its replacement key. Preferences stay in this browser only.
Session complete
Local evidence
The most recent ten completed runs are retained locally. They are not transmitted or used as hidden evaluator data.
Game-loop budgetCollecting frame evidence
Bounded CodeForge task
This public specimen validates an approved task packet against observable checks. It cannot apply a patch, commit, publish, or promote itself.
Not evaluated in this browser.
Evidence ledger
Capability is separated from authority. CodeForge may propose implementation. Tests verify bounded behavior. A person decides whether the artifact is ready to publish.
Movement, collision, rotation, row clearing, scoring, seed replay, hold behavior, ghost projection, and restart are isolated from the interface.
13 deterministic testsThe game supports remappable keyboard control, large touch targets, text state, visible focus, and reduced motion.
Human review pendingNo Tetris name, visual identity, music, or artwork is used. The page describes the actual implementation boundary.
Publication boundaryImplemented through a governed AI-assisted workflow using the CodeForge contract. Deterministic software verification. Product direction, visual review, and publication authority remain with Jason Cardona.