There appear to be no technical problems with the feed except the minor one that the 'guid' tag in the first line after your 'item' tag reads
<guid isPermaLink="true">
but is not a URL, so either it should be "false: or there should be no reference to Permalink. I wouldn't have thought this would have been a reason for rejection.
Your episode's 'explicit' tag is set to 'clean' - is this correct? The episode would need to contain no strong or sexual language. If there is such you will get rejected unless the tag is set to 'yes'.
What reason if any was given for the rejection when you submitted it?
Incidentally the feed contains only 'episode 2' and appears to be titled as such. When you add an episode you don't need to create a new feed and submit it, you just add the episode to the feed. Once submitted and accepted you can add episodes without further submissions being necessary.