Nebula Defender

There is a tiny nebula, packed with objects containing rare minerals. You found the during your exploration mission and you have reported back to headquarter about it; now the high ups want the nebula to be secured and they are sending a huge fleet to secure it. However, the fleet does need time to reach the nebula from the home planet, so the headquarters have ordered that a temporary defense be established by... you, of course, because no one else is there. Bad for you, some not- so - far away aliens are aware of your presence and they want you to go away from that nebula. Being under orders, of course you don't simply leave when you are asked to so they have started to open fire and you will fight back. Use the Left arrow key to turn your ship left, Right arrow key to turn right, Up arrow to move forward and the down arrow to activate shield. Your shield is very powerful but it is activated based on a limited charge which drains fast. After the charge is empty, you will have to deactivate the shield and wait until the charge is refilled by the ship engine. So you have to use the shield momentarily at dangerous time only. You can shoot at enemies by pressing space bar; when the enemy ship explode, there is a chance that a power up item can be collected. Collect all of the power ups item and hold your ground for as long as you can. Run out of lives means that the game is over and the nebula is lost