Right its not about running, (understandable) but that doesn't mean I should feel like nothing is happening most of the time, I did not know you could use the toilets to move around, I never saw any toilets in the game, perhaps you should make that more clear to the player that it exists in the game.
Do not rely on a video tutorial to play your game, it should be designed well in game in the first place.
The inventory equip was not made clear to me, I don't know if its the case, but using E should be contextual rather then inventory based as there is really not much variation as to what a player can do at any given location.
Example: If i click E near a blob it shoots it, if I click E and it would need to use something from my inventory to do that action, it should do that action. I was given no in game clues as to that there even was a system to set my active inventory Item.