The game really fits the idea of the jam, the radar was a nice touch, as other players pointed out the laser could have a longer delay or shorter duration, also a difficulty setting would be a good idea for different skill levels.
The animation for the atmosphere taking damage is a really nice detail, and the music fits well the environment set in.
My personal suggestion would be to add an animation on the game over screen and show final score, also keep a high score on main menu.
Really cool game.