[Solved] Reducing enemy's life problem

How do I...?
#1

Hi everybody. I am a starter with GDevelop and I am finding a problem I did not have previously.

WHAT AM I TRYING TO DO:

I am trying to do this in the game: when a shot-sprite (“disparo”) hits the enemy (“enemigo”) all these things should happen:

1.- Shot-sprite (“disparo”) must change from animation 0 to animation 1 (explosion)

2.- Enemy´s life (“vida enemigo”) must be reduced by 1. Enemy life is fixed at the beggining of the game with a “Life Counter” equal to 10.

3.- If enemy life is equat to zero, then enemy sprite must vanish.

4.- If shot-sprite (“disparo”) hits a colission box that covers enemy’s head (“PC_Enemigo01”) enemy’s life reduces

WHAT’S THE ISSUE:

Nothing happens when enemy or enemy’s hitbox collide with shot sprite.

Could please anyone tell me what I am doing wrong?
Thanks in advance!!

SCREENSHOT

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#2

Do u have more than one Enemy “Enemigo” in ur Scene? Im not sure but u can try to handle the Enemy HP (vida enemigo) with an Object variable (for object Enemigo) and not with a global Variable.

#3

Thank you so much! I changed the global variable for an Object variable like you said and now it works perfectly!