I can't seem to get past those things with the wings.
They can be quite brutal but very beatable. It's kind of a pre-boss gauntlet so there aren't that many of them. And if all else fails, one can always scour the world for more health upgrades (others too in case you haven't found any yet) first.
There seem to be plenty, I got past a couple just fine, then 2 came down and I died.
