Hey InVeRnyako!
Thanks for the kind words!
if you press E on the phone booths to start the quests the icon above will change to a ... meaning the quest is still active. (and a ! means that the quest is completed and you need to get the bread)
i have plans in the future to make this a bit more clearer but keep blowin things up and you will get there (ending is the best bit hehe)
When I was prototyping the torpedo mode it took me a while to get used to it also - but after a bit it clicked and It was good from there. I find the trick was to stop moving before you enter torpedo mode haha