This is a major release. There are lots of changes, including a complete all-original soundtrack, new graphics, sound effects, vast gameplay improvements, and much more!
A more detailed announcement can be found on the website.
Important for package maintainers: Taisei has switched to the Meson build system from CMake. Please familiarize yourself with the new build process and requirements. You probably want to pass --buildtype=plain to have it respect your CFLAGS. Contact us for further assistance.