Alternatives to exe files for standalone games

Hi,
First off I think youre all doing a great job of opening up the 3d world to everyone willing to study for free. I work in the education sector and would like to use BGE to create interactive learning environments. My idea is that students can investigate things in rooms or places which will react to contact and start off a learning activity.

The only thing preventing me getting stuck in at the moment is that a standalone is an exe file. Users wont be allowed to run an exe file. Is there an alternative method to starting a game ?

Kind regards,
Bruce