This is a comprehensive Japanese language reference tool. For this specific update, I have a few issues to raise.
1. I cannot find where to customize the software, especially the color of the cards during learning sessions.
2. There are UI misalignment issues with the Reference > JLPT page. The cards of N5 etc overlap one another after scrolling the page for a while, and the notification for the next exam is partly covered by the N5 card.
3. The review and study buttons in the learning function are too far apart. Since studying and reviewing are closely related, it would make sense to place them both under the graph.