It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

When I used to play this game as a kid, it was a rebuilt Windows version as seen here:

What are the chances that these could be added to this pack? :)
I believe it actually is using the windows versions through scummvm. You get the sound effects that the windows verisons have, plus the drop down menus, based on the windows menu system. However, the scummvm menu aesthetics leave a lot to be desired.

The windows 3.1 files themselves do not work as they are 16 bit, and need to be run within 3.1 dosbox.