Do spells targeting creatures work on token creatures?
Token creatures are creatures, so they can be targeted and affected by anything that refers to "creature(s)". If a token is returned to a player's hand, it disappears, so it doesn't matter that they wouldn't be able to cast it. This is stated in rule 111.7:


  A token that’s in a zone other than the battlefield ceases to exist. This is a state-based action; see rule 704. (Note that if a token changes zones, applicable triggered abilities will trigger before the token ceases to exist.)