There is a boss you can fight but it keeps going after that, this is simply just meant to be an endless game.
Viewing post in OH NO! Aliens Stole My WiFi!!! comments
If you play the game offline, you should notice the cat has new dialogue. If you then reconnect to your WiFi, the next enemy you kill will have your WiFi.
This game was meant to be a game you would play if you didn’t have internet, so it’s assuming if your offline you’re waiting to get your connection back.