Hey! Thanks for the feedback!
About the "Attack" action not being used, I added it because if the player wants to capture the piece overlapping them, and doesn't want to move or let the piece move, the attack will be the only option, but it's just a very situational action to allow for more freedom of choice.
As to not break the 1BIT-jam rules I created a new project to update the game
Some updates that might interest you:
* Added an automatic path prediction line for the pieces. (probably janky tough so be careful)
* Added inputs that correlates to actions (you can find them in the description)
* Updated the boss fight so that the boss actions are more clear, but he's still relatively difficult to beat since it's still the last level in the game and the only boss
Hope to hear your opinions if you play the update! (And good luck on the boss if you do)