Really engaging - that last mirror puzzle had me thinking for a couple of minutes. However, it took me a while to realise that the white spheres could be interacted with. The pause button also got in the way when I was trying to shine the light on things at the top-left part of the screen. Finally, I really enjoyed how the mechanics were used in the penultimate scene. So much so that I went through the entire game again after falling off the screen at the gates and respawning outside the camera view.