Some of them have bombs in

There are packages going to the top.

Some of them have bombs in.

The bomb-detecting machines will show you if a package has a bomb.

If it does then click and drag it to the Controlled Explosion area.

Dragging a non-bomb-package to the Controlled Explosion area will cause you to lose points.

If a bomb reaches the top then it's game over. 

Press M to turn off the music.

I over-scoped so went well over the 3 hours to around 6.

Sounds from freesound.org under creative commons license:

https://freesound.org/people/zagi2/sounds/268014/

https://freesound.org/people/Larakaa/sounds/503503/

https://freesound.org/people/freemaster2/sounds/172350/

https://freesound.org/people/InspectorJ/sounds/448226/

https://freesound.org/people/noirenex/sounds/245662/

Font:

https://fonts.google.com/specimen/Reggae+One?preview.text_type=custom