Beethoven Beats joins several other music-creation Google tools (see STUDENTS WILL HAVE A LOT OF FUN EASILY CREATING MUSIC WITH THESE THREE GOOGLE TOOLS).
In it, you tap out a beat, and Google then find a Beethoven melody that sort of matches it with your creation, which you can then share.
Here’s how Google describes Blob Beats:
In this rhythm-based game players take control of the Blobs and are challenged to play iconic compositions remixed in an arcade style. Hit the falling notes at the right time to play a classical masterpiece and score as many points as possible to maximize your high score. Progress through the difficulty levels as you develop from amateur to virtuoso and take a moment in-between your masterpieces to learn some fun facts about the composers who created them.
I’m adding both to The Best Online Sites For Creating Music.