Use the spacebar to highlight all of the hotspots.
Which hotspot do I need?
One is called Look Up and it will reveal the Satellite Dish.
How can I sabotage the Satellite Dish?
Perhaps you could throw something at it. Try everything in your inventory.
What can I throw at the Satellite Dish?
Throw the Profit Pet Plushie at the Satellite Dish. It's found on the floor of the Alleyway. Why this item in particular, I'm not sure. But it is also used in the other method of accessing the Arcade Machine, so maybe just for symmetry.