I struggled to make the rhyming scheme feel as effortless as in Memento’s original. It definitely feels more forced, but damn if I didn’t have a lot of fun!
Talk about ramping the stakes! The direction you’ve taken it is perfect. No poem is epic without a good subplot. In terms of meter, my best advice is to watch how you use destressed syllables, especially at the beginning of lines. By maintaining a consistent number of destressed syllables between the stressed syllables, the reader will be able to perceive the flow easier.