What is a mouse looking animal with ears like squirrel and long flat tail?

You're describing a Jerboa.

Jerboas are small rodents found in deserts and steppes of Asia and Africa. They have:

* Mouse-like appearance: They are small with large, prominent eyes.

* Squirrel-like ears: They have long, thin ears.

* Long flat tail: Their tails are long and flattened, often with a tuft of hair at the end.

Jerboas are known for their amazing hopping abilities and their nocturnal habits.