New game - Dodger

I'm still a relative newbie with Android development (I've been programming about 5 years and developing android apps for 1 year) and I'd love to get some feedback on my latest game! It is a relatively simple yet addictive game called Dodger and the aim of the game is to avoid the aliens for as long as possible. Each alien you avoid will give you 1 point!

The Google Play listing is:

Dodger also has a world wide leaderboard so you can compare how you do with people from all over the world!

It'd be great if I could get some feedback on parts of the game I could improve or if there are any cool new features people would like to see! I'm also on the lookout for a graphics designer to help make an awesome logo and feature graphics for the Google Play listing, so if anybody is interested feel free to contact me at :)