Google is making some big changes to Android for its so-called “L release” this fall, and starting today, it’s giving interested developers the chance to take an early look at it. Naturally, we wanted to try it out too, so we got the preview running on a Nexus 5 to see what it’s like.

There are three major changes on the surface of Android’s L preview worth paying attention to: an overall design overhaul, improved notifications, and rethought multitasking. The design changes are, of course, the most immediately noticeable. KitKat’s sleek Holo theme is being replaced with a colorful new style called Material Design, which Google says is based on basic shapes and sheets of paper.