 Google is making some big changes to Android for its L release this fall, and starting today, it's letting developers take an early look at it. Naturally, we wanted to try it out too, so we got the preview up and running on a Nexus 5 to see what it's like. There are three major changes to pay attention to here. The first, and the most obvious, is that there's going to be design changes all across the OS. You can see it right away in Android's new buttons, a triangle, circle, and square. New designs aren't in place across most of the operating system just yet, but you can already see it in action in a few places, like the calculator and the dialer. Google is calling the style material design. In most places, you'll find splashes of bright color, simple geometric shapes, and basic shadows to let you know when a menu or a button is above or below something else. Pretty much everything you touch animates too, and in a really playful way. At first glance, it's all pretty stylish and smart. The next big change is to multitasking. Now, all of your apps will display as separate cards, almost like a Rolodex. But more importantly, every tab that you have open in Chrome will eventually appear here too, blurring the line between apps and websites. For now, the layout seems a little bit more inefficient, but it certainly looks good. The final major change is to notifications. For one, big interactive notifications will now pop up when you're inside an app. You can also now interact with them all straight from the lock screen, swiping to dismiss them or dragging to interact with them. It looks like a really useful addition. Android L looks good so far on the surface. Now, we're just looking forward to seeing what the rest of it looks like.