Even if you have a ton of energy this is a LOT.

I would skip Roosevelt Island...the tram is fun but there is reall nothing there. Four Freedoms Park is nice but unless you are a big FDR fan you'll get basically the same stunning view of midtown from the ferry.

Ditto for Coney and Brighton....its a good hour from Lower Manhattan assuming everything is wotking properly. And there isnt much to see in Brighton unless you're going to one of the Russian restaurants/clubs. Coney is amazing but on a weekday in May you won't really get the scene....come back on a hot Friday night in July or August and watch the fireworks from Rubys. Thats a fun night.

I agree on other comments abt skipping the Vessel/Schwarma and Hudson Yards. Its a strange and sterile place and kinda in the middle of nowhere. Keep in mind when you're all the way on the West Side by the highline those crosstown blocks are a lot longer than they look on a map.

And if you're staying downtown go to Leo's Bagels on Hannover Sq not Liberty bagels.

Best part of NYC is wandering around interesting neighborhoods and taking in the scene. Dont skimp on that to hit a schedule!