Thank you for playing the game! I haven't encountered the bug you mentioned so I'll try to duplicate it. For the controls, I was also thinking about it during the start of the game jam to match the isometric view but for me, it kind of felt off in a way because of how the stages were designed. I wanted to add in the tutorial level indicators on which button would make the cube move in which direction.
I'll keep in mind the suggestion of matching the controls to the isometric view (as a toggleable setting) but for now, I'll leave it skewed since it's still the voting period.