Hello 
I'm new in Clickteam Fusion 2.5 and I have a question.
First, sorry if I write something bad or I don't express well, because english isn't my main language XD
Now, I'm going to ask you something.
Actually, I'm developing a very simple game. In this game, when you pass a specific number of floors a shop appears and you can buy a damage increase.
With any increases, the projectile deals 1 of damage, and when the projectile impacts with an enemy, it subtracts 1 from the enemy's counter.
If you take the damage increase, it subtracts 2 from the enemy's counter.
I thinked that the easiest form is creating an event that when the projectile collides with the enemy, a global value that I named "Damage" is substracted from the enemy's counter. But the bad thing is that I don't know how can I subtract a global value from a counter.
Do you know how to do this or another way?
Thank you 
