Three panels, read from your own database, visible only to you.
?sample=1 from the address and sign in to see
your own.
SUPABASE_URL and SUPABASE_ANON_KEY
near the bottom with the two values from your Supabase project
(Project settings → API). Until then this page can only show you itself.
A magic link is emailed to you. No password to store, and no account for learners.
The spot-the-problem screen hides a few planted clues. This is the share of learners who clicked each one.
The last screen each learner reached. Anything short of Finished is someone who left.
How often each question was missed, and which wrong choice they clustered on.