Really liked this game, very simple and fun. And I really like the background and how you can explore around it even though it's not required.
A couple things I thought might be an improvement: Different colors for the different levels of enemy firefly. As they're all purple it took me a double take to work it out sometimes. And when you're the big bug there's literally nothing to stop you, but it's really hard to catch things as you powerslide all over the place! :P
I didn't really use the power ups, although the shield did come in handy a couple times.
Really cool!