Left and Right arrow to move. Shoot all the aliens with spacebar and don't let them cross the red line! Enjoy :)
Stole code from @abricot-apricot, sorry :| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v1.2: Added thumbnail - added score at the end! v1.3: Buffed Aliens - Nerfed player
