Hey I think you got a pretty nice game, but was the ennemies supposed to go down? I was just shooting at them and collecting coins. It was complete tho, no bugs, no problem and tons of effects / visuals. And also maybe you can post the credits screen on somewhere or make it scrollable? I've lost on it, it was too fast to read. But overall it was a good idea
+ kudos for the Linux and WebGL builds, multiplatform is da wae :)