Ship classification in project. I highly recommend that you view it. Move the mouse your ship will follow. Click- fire normal laser or power up Space- Fire your powerful laser (Warning! Laggy!) Close classification. B- boost Defend Earth from the waves of enemy ships coming to attack it. Be careful. If your health gets to zero you will have to wait to come back. If earths health gets to zero you lose. You get upgrades by buying them. You get loot from enemies. Collect the circles with an attack on them for a power up.
thx UndeadSorcerer