Thanks for playing, glad you enjoyed it! I had initially planned to add a horizontal indicator for the projectiles from the final boss's vertical slam, in retrospect I wish I had added that for the reason you mentioned. Thanks for the kind words, glad you liked the attack indicators. I'm always afraid all the indicators will come off to "video-gamey" if that makes sense, but it also makes the game way more fair, and lets me run wild with attack pattern designs.
Hope you enjoy conqueror mode! It definitely cranks the game up a few notches. It can be a little polarizing with the increased difficulty.