Hey ! Thanks for the comments and your time and feedbacks on the game. Yeah the game started chill and maybe today the chilly part of the name isn't so true anymore :D
To be honest, I don't remember how I handle the guide mechanic. I can't recall if the devlog by Jason Knight on his game Isoputt helped me. Or if I just used the move_and_collide with test_only to true (Godot 4.2). I think I actually simulate the shot to be certain the prediction is 100% correct.
Hope this helps !