I like it, I enjoy the lighting effects, great job!
One piece of feedback could be how unforgiving the collisions are with the blue squares. There were a couple times where I would be on safe ground, and a few pixels of the rectangle would be on the blue squares, instantly resetting me. Perhaps this by design, and I'm just a big baby, but could have been neat if there were, say, 1px or something. I dunno.
I also agree that failures were a bit sudden.
Overall, good work :)