Besides focusing on the surface design, project designer also focuses on the aspects of interface design. The
interface design highlights several criteria including the ‘cosmetic’ part of the project, usability, user interaction,
navigation, user experience and also system support. For example, the use of text, button and graphics to show
learners which section they are in. Adams et al. (2008) stated that the interface design is as important as it will
support general features as example, to make a simulation engaging and easy to use for the users, and the types of
controls that could enhance students’ engagement in learning. Moreover, Oppermann (2002) also agreed that the
presentation of the content is important as it will permit the learners to interact with content efficiently.