Starter project. Use arrow keys to land on the head but don't get hit by the rockets. Remix/extension ideas: levels. add ufos based on duration. add lives or health. make the head float. make the ufos shoot at the rocket, etc.
These sprites were designed by Jacob Zinman-Jeanes (http://jeanes.co) for Gamedevtuts+ (http://gamedev.tutsplus.com/articles/news/enjoy-these-totally-free-space-based-shoot-em-up-sprites/). They’re licensed under the CC BY 3.0 license: http://creativecommons.org/licenses/by/3.0/. Published a similar project to Raspberry Pi Geek Magazine.