Hi Veronica and welcome to the forum. I’m glad you came here to get some input - beginning beekeeping is a huge learning curve and using a Flow hive does pose certain nuances that aren’t necessarily obvious when you start out.
The bees in your photos aren’t babies but full-grown workers, that look pretty dead to me. They came up during the winter looking for food and probably got too chilled/damp to survive the trip back to the cluster.
Out in Indy like here in PA where the winters are several months long and can be very cold, we need to take Flow supers off at the end of the nectar flow. It’s good you had some insulation on the hive, but leaving the Flow super on was counterproductive to that effort. There are lots of great posts that explain the reasons for this and include all the info you need when getting ready for winter with a Flow hive - here’s one:
Have you checked the brood box, and if so what did you find? If you haven’t taken off the Flow super yet, definitely do it now. If your bees survived, they need controlled space to start with and won’t be ready for supering until the weather is above 40f at night and there’s a good nectar flow on. If they didn’t, you’ll need to protect your unguarded equipment from pests and put it away for now.
Stay with us here, ask more questions, and let us know how things go!
PS: when the Birds don’t make it I am a Colts fan FYI 
lots of family in Indy!