Absolutely, you continue to play for a couple reasons.
1) Verbals are committments but not binding yet. "Stuff happens", and you need to continue to get exposure. Honor the verbal, but continue to go to showcases to further develop your skills and exposure to college and pro scouts.
2) Help your team mates get their verbals too. Just as Coach May pointed out, it is very upsetting to see kids/parents drop the team after they "get theirs". It is just flat out WRONG, and I've seen it happen up close. I think it says alot about your character and upbringing if you continue with the team until the season is over despite having an offer.