So far I have enjoyed first 2 levels but one thing is like a sore thumb for me and that is Task Activation.
As far as i have been able to observe task activation most probably uses hitbox to register if the task is within "reach" however the hitbox doesn't stretch close to the player. I would recommend adding a range limited raycast as a adition to shuffling the hitbox a little to make it much more predictable.
Second thing that i considered a little not happy was the O2 placement. Those boxes were a little higher than I would asume they should be (considering player height).
Last but not least fun addition could be adding a "map influence" by spawning aditional body props on location the player has died before...