If keys are getting stuck you can double tap the key to unstick it. hope this helps. (this works for all games, but can still be annoying) Also, you spelt health wrong in the description of the recover health under the perk tab :) hope this helps!!
What!? No WW1 german helmet with spike on top in character selection! Other than that though, this is a great game, unfortunatly with slightly repatative gameplay, but still 4/5 stars ^^