Edit comment.

Stop passing orientation to step() method.

Simplify reversibility.

Fix links.

Update README and screenshot.

Pluralize 'coordinate' in comment.

Refactor step() method.

Extend copyright range.

Change 'movement:' label to 'move:'.

Change speed base to 4 and reduce speed steps to 10.

Use forward/backward instead of forwards/backwards.

Don't turn off previous dots when generating random dots.

Edit comment.

Update license.

Fix typo in comment.

Simplify menu rendering.

Update repository URL.

Update README and screenshot.

Refactor pretty_print() function.

Fix comments and tweak code.