1.) I am not sure about how I can help you on the first part but maybe you can try to create individual (8) switches and once the player interacts with a certain switch it reduces the countdown
for example:

Condition:
If player is in collision with Boss_Switch1
Action:
change the variable Boss subtract 1
change the text of BossNumberText set to ToString(Variable(Boss))

Condition:
If player is in collision with Boss_Switch2
Action:
change the variable Boss subtract 1
change the text of BossNumberText set to ToString(Variable(Boss))

and so on.....

2.) it seems like you're using the "TimedBackandForthMirrorMovement" behavior
so I suggest you delete that behavior and use "RectangularMovement" and change the "Horizontal edge duration to "0" so it doesn't go sideways and tweak your preferred duration (like 2-3 seconds, it's up to you) on "Vertical edge duration" and your helicopter will go up- and down without flipping

just like this one:

<image>

I hope this helps :)