Answer:
I had only one option: beat Matt Forte at bowling.
Step-by-step explanation:
There are no capitalization or punctuation error in the above sentence.
Actually, the use of colon here is appropriate because it is helps to explain what option he actually had.
Colon is used to connect two sentences when the second sentence that follows the first explains, summarizes or sharpens the first. The both sentences should be closely related and also complete, i.e. the sentences should give a complete thought.
So, the above sentence is correct.