Simple:
* The two dogs tussled playfully in the park.
* The team tussled hard for a win but ultimately lost.
More descriptive:
* The wind tussled her hair as she walked along the beach.
* After a long tussle with the lock, he finally managed to open the door.
Figurative:
* The author tussled with her muse for weeks before finally finishing the novel.
* The politicians tussled over the bill for hours before finally reaching a compromise.
Informal:
* We had a tussle over who got to ride shotgun.
* I had a tussle trying to get the lid off this jar.
The word "tussle" can be used for a physical struggle, a mental struggle, or a metaphorical struggle. It adds a sense of energy and action to your writing.