2D Shooter Game 

Prompt: Write a code in javascript with index.html for 2D shooter style game where you control movement with cursor keys left and right and fire with space bar.  Enemies are space invaders style going left right and then down one row all at once. Check for collision between player and enemies, as well as bullet and enemies, each bullet can kill one enemy only. Limit number of player lives to 3. Make special enemy at the very top row that goes twice the fast but if player kills it it gives one more life. If all enemies are killed start next level with enemies going faster.