In this paper, we describe the design of a goal-based problem solving oriented interactive game on biodiversity. The audience is children ranging from age 6 to 14. We focus in our paper especially on a) the instructional design of the game and b) the support structures. We differentiate between modeling, coaching, scaffolding, and general support structures and focus especially on the design of scaffolds that were integrated in order to provide learners with feedback, guidelines, and help structure.