You punish him when he bleeps and the little "happy face/sad face" at the bottom-right hand is showing but there's nothing wrong with him.
You praise him when he goes dark and has like a little cross beside him.
Hope this helps.
I haven't seen mine (Gooba) do any of those things yet :o . He's in the "strawberry" stage. I have seen him roll around the screen and dance around it with musical notes above him.