Website feedback

Why can’t I open my completed lessons to revise them again?

Can we have standard IPA or at least a switch to use IPA instead of the current system to indicate how a word sounds like?

On my page the overall score is shown as 94. I do not understand what it really means. Does it mean comparing a native speaker, my pronounciation is 94? It does not compare with other users, if I am among the ones who have improved from another point to this point? Since when I have improved my score? Who are the same like me? Am I among the 20% of learners on the website? Is anyone improving better? Am I like another person and I have improved better?

If I already have a file with my speech, can I get feedback on it?

i choice the sloweest voice, but when i play the record, but It sounds like the fastest speed, so fastest speed is same to slowest speed. is a bug?

I tried to say some words intentionally incorrectly, and still got "Well said" feedback. I was saying literally gibberish