Thanks for playing! I've never understood how to make remappable controls in Unity, I'd try to at least have alternative controls so people can use the one that's most comfortable.
One of my goals for this game jam was to learn Unity's new input system as it's supposed to be better for remapping controls. However, I had so much trouble just getting the basic input working, I didn't want to change anything in case I broke it again. So, while this game is horribly rigid in it's controls, it's a small step in learning how to make my games more accessible.
I'm currently working on a full version of A Most Ghostly Game that has an option to play with just a mouse, the game jam version is limited when it comes to accessibility but still can be played with one hand.