This is a bare version of single player T3TR0S, because we miss the accessibility and simplicity of its code before features become a priority.

An example of running tetris with sci graalvm.

1. Follow the membrane example instructions.
2. Connect to the repl
3. Run the namespaces in the following order: board.clj, rules.clj, paint.clj, core.clj
4. From the core namespace, run (init) to start the game.