Soluto Full Stack Developer interview questions

The interviewer told about the company and then give me a react project. The project was about developing a smart home using React. You only get an API so the task is only client. You have to develop a main screen which displaying all devices in the house. Clicking on the device shows a screen where you can update the details (changing the temperature of an air conditioner for example). The time for the task is about 2.5 hours exacly and also if you finish the task (like me), you've got a rejection. The developers there are not so professional as I see.