can i use a triangle or an arrow to indicate a diraction/there the player is pointing? or maybe can i make a not equilateral septagon?
Septagons CAN be non-equilateral for sure, but triangles aren't allowed. You can manipulate a septagon into an arrow.
You can review some exceptions to the Septagon rule here:
https://itch.io/jam/septagon-game-jam/topic/4065238/more-info-about-the-upcoming-game-jam