Hi, thank you for playing. I only noticed this bug after we shipped it. Since I wanted to work a bit more on it, I focused on the save system that I left half way and will work on it later, but it seems that the native controls the engine gives over the buttons interact with whatever button you choose on both the up and down arrows and the w and s keys, if you de-bind them you cannot redo it.
I can only apologize, I am ashamed, but I am glad you liked our art and music. Props to our dear Itsumi for their excellent work. Glad you had fun, thanks for playing with us!