Yes, it is now possible thanks to Matlab Online. First, you would need a Mathworks account, you may have one if you already have a Matlab license.

Then go to the OSCAR Gitlab page and at the bottom of the readme file, you will find a button named Open in MATLAB Online:

It should open directly a Matlab window in your browser with git repository installed:

Then one can navigate in the folder examples and run them with the green arrow on top:

Et voilà!
(to be transparent you only have a monthly free number of calculation hours with Matlab online but it is still an amazing product)