Very difficult to navigate – Spelling Bee Lists 1000+ Spelling Tests Grade 1-12 Review

I can only access Grade 3. I thought I would be able to explore different grade levels for my kids. However, the only thing we seem to be able to access is grade 3. I may be misunderstanding how the app works but I did not feel that this was made clear when I purchased.
Review by trouble spelling on Spelling Bee Lists 1000+ Spelling Tests Grade 1-12.