First cross-platform official release

Which files are meant for which operating system?

If you are on WINDOWS OS (10 and above only), you may download either muzik-offline_0.2.1_x64_en-US.msi or muzik-offline_0.2.1_x64-setup.exe
If you are on MACOS(monterey and above only), you can download muzik-offline or muzik-offline.zip or muzik-offline.tar.xz
If you are on MACOS(monterey and above only) and you want to use dmg, you may download either muzik-offline_0.2.1_x64.dmg.zip or muzik-offline_0.2.1_x64.dmg.tar.xz, extract the files and you will see muzik-offline_0.2.1_x64.dmg
If you are on UBUNTU(22.04 and above only) or any debian based operating system, download muzik-offline_0.2.1_amd64.deb
If you are on another LINUX based distribution, download muzik-offline_0.2.1_amd64.AppImage and build_appimage.sh and you can proceed to build the app image

Please note that some features(such as Airplay and Chromecast) are not yet implemented and as such, will not work. However, for the most part, most features do work.
If you encounter a bug whilst using this app, please file an issue report here: issue reporting