Topeka has been backported
The new version of Topeka is available to API level 16
, enabling ~ 92 % of Android users to use it, thanks to the support libraries.
Even though users on versions lower than Lollipop won't get to experience all the animations, they're still able to enjoy the app.
It also features an enhanced set of Espresso UI tests
that help to keep breaking changes to a minimum.
If you don't want to build it yourself, there's a prebuilt apk in the release section: https://goo.gl/ek9qSM