A cool take on the theme!
I wasn't able to beat Simon sadly, as it is rather slow while fairly repetitive (though I do suppose that's thanks to the theme!)
Might be worth speeding up past attacks so memory is required, while keeping the new attack for each round reactable. And with 100 hits required to beat Simon, might be worth collectables in pattern based rounds to improve your attack power that get lost if you're hit?
Regardless, I thought it was good fun and a unique take on the Loop theme, definitely difficult though!