Gosu is a programming language designed for game development, particularly for creating 2D games. It is built on top of the Java Virtual Machine (JVM), which allows developers to leverage the power of Java while providing a simpler syntax and features tailored for game design. Gosu supports static typing, making it easier to catch errors during development. One of the key features of Gosu is its seamless integration with Java libraries, enabling developers to use existing Java frameworks and tools. This flexibility allows for rapid game prototyping and development, making it a popular choice among indie game developers and hobbyists.