Sentence 1: Charlie was playing a new game on his smartphone. 
 Sentence 3: He started playing it so much that he neglected to do his homework 
 Sentence 4:  He started getting bad grades, which made his mother mad 
 Sentence 5:  His mother took away his phone as punishment 
 Option 1: He was getting bored with it. 
 Option 2: He was getting really engrossed in it.