Play any type of Game at Y8.com. The biggest Game Collection to play free online. Flash, Unity 3D, Html5, Android, Java and Shockwave.
If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Shoot all the aliens and upgrade and build multiple weapons to make taking them out easier.
Left / Right Arrow Keys - Move.
A - Jump.
S - Fire Weapon.