My Ludum Dare Jam entry is Those Stupid Aliens. It’s a top-down space shooter.
The player is firing from a capital ship at the bottom of the screen. It has just gone through a battle, defeating the enemy battleship, stranding hundreds of aliens. As a result of the battle, it only has enough shields to withstand five hits. Your technicians are routing power and fixing subsystems, but they are tired. When you defeat a wave of enemies, it builds up the morale of the crew and they repair one point worth of shield. And that brings us to Those Stupid Aliens, and your job, as one of the last remaining gunners.
Using the mouse to guide the targeting reticule, and the left mouse button to fire, your goal is to shoot the alien ships that appear. They will show up in groups and express different characteristics based on the makeup of their internal properties. As the game goes on, the successful aliens will have their internal properties inserted into the gene pool, and the next waves will be created from this information. Eventually, you should see ‘smarter’ aliens which are more difficult to defeat.