My son (6) says "I love the lasers, but I don't like the frustrating things like the lasers and having to get the key through the lasers!"
I think you could consider changing the hold to jump higher to a double jump to make movement more fluid.
Can I just say, that as a first game jam entry, this is pretty amazing! I loved being able land on a frozen laser beam to access a door.
Music is also lovely and chilled