This might have been answered somewhere here, but could not find it, and could be a stupid question. Anyhow, I'm having the hardest time using either a medkit or the riot shield I just got. I know it might have something to do with either c or v on the keyboard. Alas, I cannot utilize any of these items. I like the game otherwise, very frustrating not being able to heal myself. Also was curious what happens if times runs out on the mission?