Add achievement system for long-term motivation

[AllesSuper]

What problem would this solve?

Increase the gamification level to keep the interest high for a daily use of the app.

Proposed solution

Create an achievement and badge system that rewards learning progress, streaks, accuracy and completed adventures.

Alternatives considered

No response

Area

Gameplay

Project principles

• This idea keeps the app offline-first, ad-free, and privacy-friendly.