Your question is almost the same as the one in this thread from yesterday, it might help:

Are you using one of the fullscreen options?

I would remove the is overlapping event in the for each event, for it's unnescassary, because the zombiebox and zombieheadbox are already in the container with the zombie so the actions will only affect the ones concerned.

These overlapping events event could create issues when two zombies are overlapping..

19 shouldn't be a subevent of 18, but a seperate event.

Two questions:

Is the layer with the arrows set to paralax 0,0?

Are the arrows within the dotted line (original view) in your layout?

From the tutorial section:

https://www.scirra.com/tutorials/1461/h ... age-plugin

I think you are overcomplicating this, but The question isn't really that clear..

What is the difference between ranking them from 0-6 and giving them an unique number?

Would it be possible just to use one sprite with different frames and or animations and in this case would using an instance variable work if comparing frames or animations didn't?

I have no clue what you mean..

Why should you destroy an animation?

Do you mean:

player on collision with gun

player set animation to player_gun

You can set animation from current frame instead of beginning if the frames of the animations are the same.

If the animations are different you could first check the current animationframe and set the frame of the new animation to the corresponding one..

What do you mean by skip collision?

or

What do you want to happen and what happens at the moment?

i figured that the compare value was basically "Every tick" and any time the player position value changed it would update the comparison with each object..

I guess this is actually true..

But you are not telling C2 which object you want to affect when the condition is true..

The system compare action just compares the values..