Sure! I can help you with that. Here’s a game where you have to identify whether a sentence is a run-on sentence or a complete sentence.

1. The dog barked loudly, it scared the mailman away. - Run-on sentence

2. I went to the store and bought some groceries. - Complete sentence

3. Sarah loves to read books, she spends hours at the library. - Run-on sentence

4. The sun was shining brightly, the birds were singing in the trees. - Run-on sentence

5. John is a talented musician, he plays the guitar and piano. - Run-on sentence

6. The cat meowed for food, so I gave it some. - Complete sentence

7. We went to the beach, swam in the ocean, and built sandcastles. - Run-on sentence

8. She studied hard for the exam, and she got an A. - Complete sentence

9. The car broke down on the highway, we had to call for help. - Run-on sentence

10. The children played in the park, they had a great time. - Run-on sentence

Remember, a complete sentence should have a subject, a verb, and express a complete thought. A run-on sentence is when two or more independent clauses are joined without proper punctuation or conjunctions.