At the moment, the game is not playable. It is more of a demo that shows the progress of its creation.
Below is the link that will allow you to download the executable file.
I try to put the latest version here, but it may happen that the version will be older than the one posted on GitLab.
Note: The file needs to be run under the ATARI emulator, which you can download here
I am also on GitLab :D
Archon Adventure also has its own channel on GitLab. There you will always find the latest executable file and game sources.