I prefer to have a tutorial on the controls though I managed to find it in the game page.
The mechanic is nicely done, and it's simple as it is fun enough to occupy some spare time, would love to see some powerups and the likes in the game too.
I ran out of time for the in game tut. I also think powerups would be a good touch. Maybe one that makes all the enemies explode or something. Open for suggestions.
