Well it seems I don't understand anything..
The bullets seem the same image, the enemies seem the same image, the different walls seem the same image..
There seems to be no need to use seperate events with (almost) exactly the same actions attached..
For me it makes the event-sheet unreadable..
And when I can't read the sheet, I can't find the issue..
Are you sure nothing is either overlapping or colliding with the player in the new layout?
Would it help to set Timer to 40 before the wait action?
Or add a wait 0 action after setting Timer?