Thank for your recommendations. It currently say 'space to talk'. When the jam is over I plan to move the instructions to the left a bit so it doesn't overlap the quest instructions and to change it to say 'space to interact'. I also plan to add an indicator to everything you can interact with when you are close enough to it so it is more obvious.
This is my first completish game. I'm also going to try to toy with adding sound after the voting period too.