Thanks!!!
When the player gets hit it blinks for a few moments and plays a sound effect (Maybe you played the game on mute), but we'll take it in consideration for the future.
About the player's health bar, it's represented by hat's stripe color (It goes from green to yellow to red), it only gives an aproximation of the health instead of an exact value so you dont know how low you are exacly. This was intended to increase the difficulty and the tension a bit more.
Thanks for the feedback and for playing the game!!! :)