Ok, so run the game in debug mode and check all 3 objects and their Health instance variables.
If all objects exists and all three Health variables <=0, but the layout is still not changing, it means the code on your screenshot is not getting executed. Is it part of some parent event, or an events group that could be disabled?
Try adding Browser object to your project, and insert Browser-Log "some text" into this event. Open browser console when running your game to see if this event gets triggered.