Interesting game the requires precision and ingenuity.
Its not spelled out how to progress sometimes and how to get where you're going, so I appreciate having to think about what to do.
Its pretty difficult to do some of the jumps, and failing a lot doesn't feel too awful.
I agree with some of the sentiments from David Wu SoftDev above, about the controls being a little unresponsive, but I appreciate the difficulty so I hope you don't make it too much easier.
Having to walk diagonally isn't too bad, especially when you've set up a lot of the progression to be in line with direct diagonals, not having to course correct little movements too much.
I did find a way to make the fire area easier.
I was able to jump directly to the support beam that leads directly to the catwalk a lot sooner then I think intended, skipping the segment where you jump across the light bars.
You are also able to jump in the open box and flip it on top of you in the segment before the blue fire, allowing you to just run threw the fire with it over your head till you get to the blue fire.
Pretty great job.
I would suggest the visuals for the bombs in the ending being a little easier to tell when they're about to go off.
I also agree that the first jump from the window to the bridge should probably be a little simpler, due to the awkward angle you have to jump at.
I would also like a Shift to move a little faster option. This would also be something you can plan jump puzzles around. "Do I sprint or not sprint for this jump?" for example.
I also noticed that you move a bit faster when you are moving diagonally then you do when moving just up down left or right, probably due to using two movement keys at once.