This is a hugely ambitious game-jam game, and I'm super impressive with how much you've pulled off!
The environment is cool, huge, and runs well on my fairly low-spec gaming PC. I love the comicbook feel to the visuals, it ties it all together nicely, and even helps blend in the low-poly cars and citizens. I saw a few oddities here and there, my favorite being cars shoving pedestrians down the street. Still, nothing that damaged the overall visual experience, and again, really impressive for a jam game!
The powers (particularly flight and super-speed) are really cool and fun. The build up to getting your powers was nice, and it was fun (though challenging) learning to fly. Also, the upgrades are a cool idea, though I might prefer mission/xp rewards to searching for 180 orbs all over the city.
If I had one core critique, it would all come back to the control. The walking controls were very difficult, and never got easier for me. I made it to the fruit stand mission, and was stumbling all over the place until getting stuck in-between stalls and dying.
The flying is pretty fun, but I still found the controls there finicky. The battling also was very touchy, it was difficult to hit targets even if they were right near me.
Overall, it was a mixture of fun (the missions, environment, flying) and frustration (battling the controls).
I'd love to see this continue development, it's an amazing start! Even with my critiques, this is a really impressive entry. Great work!