idk why it isn’t moving, I set to simulate moving as left (something like that).
You should remove this:
I removed it, and still it doesnt work
Try changing the max speed to it’s negative value (-300) when “left” is pressed.
Didn’t work sorry, im not sure why it isn’t working. It works when I press left and right together at the same time.
It might be because you seem to have them all set to sub-event status of the “movement” description. Try dragging the Left key press event to the left so that it’s not a sub-event and see if that might work?
You could also try doing Trigger Once on the key releases.
Not sure what’s wrong either. 
Did you set any limits for player or camera?
Try deleting and redoing the Left key block 
nope theres only barriers, I tried redoing it and still. Maybe its a bug?
Reproduce the issue in a new project and share it with us, we’ll investigate
The player moving animation is repeated twice on both left and right key press. Try doing a “animation finished” condition. Could be some kind of clash with the animations