The game is very fun! Adding the flashlight really creates a great atmosphere. The colors of the walls and the floor look like a testing chamber, reminding me of the game Portal.
I tried jumping under the stairs or the slanted platforms, but there was nothing there. My favorite part is when I went down the stairs on level one and see the sunlight shining down the corner, and I knew there was something special there (A key!). The light helps making the game feel less oppressive.