It looks okay, but I do wonder why peaceful aliens don't contact humans BEFORE they enter the atmosphere, scare the hell out of billions of people, and cause general chaos.
What if
we were hostile? Knowing they were coming would give us an opportunity to plan an attack on them.
Perhaps they didn't know the planet was inhabited when they left and only just realized it after dropping out of hyperspace (or whatever) and entering the atmosphere.
Maybe they've been trying, but for some reason humans don't seem to have invented even the most primitive subspace transmitter/receiver.
Could be tradition.
It is possible that their psychology is such that they see aliens appearing overhead as a promising and exciting thing (instead of frightening) and didn't want to ruin the surprise by telling us they were coming.
Might be that they overlooked the idea of transmitting communication across distance electronically, relying on video screens instead.
What if they were just having some fun with us?
Or if they wanted to grow a clone of one of us before attempting to communicate, and it was only ready after they'd entered the atmosphere.
Could be that they're intergalactic repo men/landlords. Somebody forgot to pay a bill and we have to be evicted.
It's a first contact of two species that are totally and completely alien of one another. The interaction between us is going to be more complex and more difficult than our interaction with any other species on this planet because of the alien-ness.