Ah I remember this! I saw all 3 clips on the TBR website last year after series 2 was finished and also when series 3 started. It's a game where you can decide what the characters can do in different situations, options are given but if you don't choose quickly then Tracy's cartoon will pick for you instead.
There is also
"Come Alone, Carmen"
You can play them here. The game is called "Beaker you choose"