Thank you for the feedback! It'll help me with future titles.
Regarding this though:
It seems like the player's movement vectors aren't being normalized, resulting in the player moving faster when running diagonally and even faster than that when jumping at the same time.
This was intentional! :D I wanted to add some tricks for movement, such as the bhopping that makes player faster. I like fast movement paced FPS games myself so having these little things made the game more enjoyable to play to me.