Start with the audience and one observable task. Should a learner recognize a hazard, choose an appropriate response, understand a sequence, or practice a concept? The game mechanic should give them a meaningful way to engage with that task.
Make feedback explain the choice
A simple correct-or-incorrect message may not tell the learner why the decision mattered. Useful feedback can connect the action to its consequence and give another chance to apply the idea. Subject accuracy needs review by the responsible educator or specialist.
Consider reading level, session length, facilitation, and the devices available. A classroom activity may need instructions for a teacher and a way to reset between groups. A self-directed activity may need more support within the game itself.
Test understanding, not only completion. A learner can reach the end by guessing or memorizing a pattern. Ask them to apply the idea in a related situation where appropriate. Keep the evaluation method and sample limitations honest; a small playtest does not establish educational effectiveness for every audience. A focused learning task gives the production a useful purpose and helps the team judge whether the game is supporting it.