Good little demo, playing through it I do have a few suggestions:
-Let people know that hitting "R" will restart the game, found that one out by accident.
-After so many speed boosts the character moves so fast it's like ice skating, could use a limit.
-The gun feels a bit weak, if intentional I get it, but it feels like punching works better.
-It is virtually impossible to break free from a grab. I was mashing the mouse button as quick as possible and best I could get was slightly into the blue part of the bar.
Still enjoyed this, look forward to more.