Alien invasion!

Alien invasion is a 2D offline space shooter chrome app game. It require mouse and keyboard to play. Game can be played offline. You control small spaceship and shoot aliens. Each new level introduce new kind of alien. Some aliens drop gold which can be used to improve ship. Use mouse cursor to aim. Use W, A, S, D keys (or arrows) to move ship. Use Shop button to buy improvements for gold you collects. Aliens cause damage to ship when they are too close or when they shoot at your ship. Life indicator is at upper left corner.