Given the problem I'm having, I can see how you'd think that.
However the main reason to include the .py file is to run it on linux... just not the way it's set up on MY linux.
Also the previous release up to version 5 had an .sh file, so I think the dev either deleted it or failed to click the checkbox to include it when the software was building the game for release.
I'm pretty sure all he has to do to fix this is to re-build it and either reupload it whole or reupload the missing parts, which should just be some .sh files: One in the base folder and another folder with them with each one being for a different type of system.
Here's a picture of the 5.x release for reference.
Interesting, yeah hopefully he updates it. For the .0.1.2 version the lib directory seems to contain linux-specific files that are not in 0.6, so I think it would require a re-upload from the creator. Wine really should work though. Runs basically any windows executable on linux, sudo wine ARTEMIS.exe