The pupils at my school are currently completing Crack the Code (Unit 2- Multimedia).  Most are using Mediator to make their game.  Some pupils are using drag and drop for Level 3 (They have to make a puzzle). However, If you use Drag and Drop pupils cannot save their game as a HTML file. 

What have other schools using Mediator done to overcome this problem?

Any other tips, ideas welcome.

You can now enter standard Mediator files, rather than HTML, since Mediator is in the moderators toolkit. This also gives you access to further tools such as the graphics editor in Mediator.