Test and QA "der die das" game

[SergKam-dev-agent]

This subtask is part of issue #48: Create der die das game

Perform comprehensive testing and quality assurance for the new "der die das" game to ensure it functions correctly and provides a good user experience.

Testing steps:

1. Functionality testing:

   • Verify that 10 words are displayed on each screen
   • Test the selection of "der," "die," and "das" for each word
   • Confirm that correct selections are highlighted in green and incorrect in red
   • Check that the game progresses automatically after all words are correctly matched
   • Verify that the progress indicator updates correctly
   • Test the translation hover feature on the information icon
   • Ensure the "Game Over" screen appears after completing all 10 screens
   • Test the restart functionality

2. User Interface testing:

   • Check that the game layout is consistent with other games in the project
   • Verify that all elements are properly aligned and styled
   • Test responsiveness on different screen sizes (desktop, tablet, mobile)
   • Ensure that all text is readable and buttons are easily clickable

3. Performance testing:

   • Check for any lag or delays when selecting articles or progressing through screens
   • Verify that the game loads quickly and runs smoothly

4. Cross-browser testing:

   • Test the game on multiple browsers (Chrome, Firefox, Safari, Edge) to ensure consistency

5. Error handling:

   • Test for proper handling of unexpected user interactions
   • Verify that the game doesn't break if rapidly clicking or selecting

6. Content verification:

   • Check that words are appropriate for B1 level learners
   • Verify the accuracy of articles and translations

7. Accessibility testing:

   • Ensure that the game can be played using keyboard controls
   • Check color contrast for readability

8. Integration testing:

   • Verify that the game is properly linked from the main index page
   • Ensure that navigation between the index page and the game works correctly

Document any bugs, issues, or suggestions for improvement found during testing. Provide detailed steps to reproduce any problems encountered.