"Circus Linux!" is based on the Atari 2600 game "Circus Atari" by Atari, released in 1980. Gameplay is similar to "Breakout" and "Arkanoid"- you slide a device left and right to bounce objects into the air which destroy a wall.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.