I was just thinking about how stressful keigo is and wondering if anyone had built a keigo conjugation game when I remembered we have kaijugation!
What if it had a keigo mode?
i.e. 見る in sonkeigo mode prompts ご覧になる, and in kenjougo mode prompts 拝見する
Keigo has a few more variables than normal conjugation so I expect it would be a bit more work to code, but I think it would be a really great way of drilling core polite constructions for various verbs