Sorry if this game has disappointed you. I wanted to try and give it an old retro arcade feeling, so a parallax star field was made to make the invaders much easier to see. There are flashing effects in the game, but that is only when you carry a smart bomb on the level you pick it up - and activate it by pulling the joystick down.
I made this game as part of a game coding tutorial/feature for Scene World. The idea was to try and make things as simple where possible, but still keep the power element features inside.