Looks like the loopholes were deliberate

Rating: 5/10 (13 February 2020)

Yeah, but how many! Other reviewers have pointed them out in tonnes so i need not go all the way.
But what were you expecting as a member of the audience. Even creatures or aliens are acceptable, but just no explanation whatsoever. ie no review can contain spoilers since the movie itself did not deliver any.
Effects fine, engaging story only to see whats next and we wait and wait and wait and..........culminated into end credits.
We deserved better. Heck, the movie itself deserved better.