I've listened to feedback and made some changes:

- Player's collision is now much thinner and closer to his feet, allowing for easier understanding when will player take damage.

- Bullets now stay still for 1 second instead of 0.5, allowing for more time for the player to notice them and dodge. Also this makes melee attacks less dangerous since players will have more time to react to appearing bullets.

- Yellow bullet speed is now 10 instead of 12.

- "Arrow" attacks are now less dense, making it easier to parry.

- Player's parry animation is now shorter to avoid confusion about the time window when you are able to parry.

- Parry "wave" now lasts a bit longer.

- Controls are now visible on screen during the 1st phase of the boss fight for players to remember it quicker.

Let me know what do you think of the changes!