Hi, you can refer to the Google Form and mention your questions about the activity that has been done. For example, ask how the overall experience was, or be specific as per the activity. Request improvement suggestions. Post in an email so employees can respond anonymously. This way, you will learn more about employee preferences and gather ideas for new engagement activities.
For example, if you have taken employees to watch a movie, you could ask if they had fun because whether the movie turned out good or bad is not in our hands. Sitting together, gossiping, laughing, and enjoying the movie together can make the experience memorable.