Thanks for playing! :)
Regarding the first 2 points: This was an intentional limitation on my part, giving a greater sense of mystery if just for a few seconds : "Oh, I wonder what's around that corner...." and also giving a bit more challenge of map awareness.
3. - Totally agreed. This is fixed in the upscaled version ( in description)
4, - Yea, I bet the hp bar could be executed better. Maybe dither the border or something