The light was absolutely phenomenal; it made my first few moments of exploring feel really, really exciting.
However, after running through a number of empty rooms and heading down a few stairs the slightly repetitive environments and overlarge environment became a little less exciting to explore. This also definitely wasn't helped by the fact I encountered no enemies until late on in my first run.
The tutorial was nice and super helpful, but I'd maybe build it right into the game so you play it when you first press start, to ensure everyone does.
It's a great basis though; think you could morph it into something really special if you made those environments a little smaller and more populated with unique objects.
Nice job! :)