Thanks for playing the game! We sure are planning on making upgrades in the future. The suggestions are interesting, making an indication for the enemy after you take the heart is something I haven't thought of but now I get why it important for the player to see it visually. I thought about shooting the heart from all 8 directions like shooting in binding of isaac, but I still want to make the ability to throw the heart with a minimal use of buttons, we'll polish it someday :)