Thanks for the feedback. You are correct that the text are repetitive for the same sentence word by word while I only change the description slightly between stages. I believe the error message and past lv100 problems should be an easy fix, thanks for finding them.
For now, my simplest and quickest solution is to paraphrase and retell the stories in a completely different set of sentences with the same content between levels. I think I can change all of the repeating texts starting lv10 in the next update so you will not read the exact same sentence word by word. This won't solve the issue of repeating content structure, but I hope at least it won't be word by word repetitive. I'll admit it's the lack of creativity of my side in terms of storytelling writing, especially a completely new passage for each level stage.
For the future, I wish provide some scenarios that are in a different content to avoid "reading the same story". Perhaps in some levels will be in a mountain cave, some levels will be near the beach, some levels will be in the woods, etc., to mimic the journey of traveling different places.