The interface is strange on this one. The only thing we can do is move and look? Also once a bubble is on the screen it's impossible to remove it except by doing another action. I would expect clicking anywhere to first remove the bubble instead of immediately executing an action.
Also the sound and music volume is much lower than most other games (I have to set my system volume to 80% instead of 50%).
Edit: ok I watched GrannyJo’s video and saw how to talk to people (it’s at minute 8 for anyone else wondering).