Haven't bought Bit.Trip Beat in a while? Now you can buy it again, this time on Android! It's part of the Humble Bundle for Android 3, along with Fieldrunners, SpaceChem, Uplink, and – for purchases above the average price – Spirits. Uplink and SpaceChem require tablets, but you can play the rest on your phone.
You're not out of luck if you lack a tablet, or even if you're without an Android phone. Even though it's an Android bundle, you'll also get the games on Windows, Mac, and Linux as well, along with all their soundtracks.