This app was mentioned in 3 comments, with an average of 1.33 upvotes
Tone Sphere can absolutely be played with one hand.
https://play.google.com/store/apps/details?id=com.bit192labs.tonesphere
Tone Sphere | 4.3 rating | Free with IAP | 100,000+ downloads | Search manually
> Ride and explore the spherical world of Tone Sphere! Celebrating one million downloads, Empyreal Bon Voyage series update is here! It's the most cosmic rhythm action game in the world, you know. More than 70 songs, 250+ levels ...
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