I really like the idea of a game that tells the origin story of a superhero. That's a really cool concept.
The havoc engine bits feel well implemented in the core gameplay loop of building a dice pool, rolling, and allocating successes. I like that you implemented the push/pull of allocating successes and objectives toward challenges while also having challenge clocks from PBTA games in the background. That was an idea that I also had but didn't find a great way to implement into my submission for the jam. Giving each challenge an active effect is also a great way to drive action from the players. That's something that I had in mind in my submission, but didn't get put into the text directly.
I like how you've weaved together some elements from the Havoc engine with familar elements from PBTA systems. Specifically the Stress Test feels like a great concept. I do think maybe there could be fewer Effects, lumping together some of the effects in the middle and leaning into the PBTA style of allowing either the Player or the GM to pick one of the results based on the narrative, just to simplify the process of rolling and getting back into the fiction.
The pages and panels system is pretty cool and I could see it being used to actually write/develop a real comic book as a fun exercise.
The added reference sheets in the back are a great touch as well. It makes it feel like a well-refined product.