What was toon first game?

It's not clear what you mean by "toon." Could you please clarify?

Do you mean:

* A specific game developer or studio? For example, "What was the first game made by Toontastic Games?"

* A specific game franchise? For example, "What was the first game in the "Looney Tunes" franchise?"

* A game with a particular art style? For example, "What was the first game with a cartoon art style?"

Please provide more information so I can help you find the answer!