Exterminate the Daleks! ARROW keys to move (up/down to move forward/backward, left/right to change aim/direction) SPACEBAR to fire laser. Green doors will open automatically when you get close (once you've got rid of dalek in room).
Daleks are of course from Dr Who (BBC). The project uses two triangle-fillers. One is inspired by @Jamohyperturbopro and @DadOfMrLog (but their version is much neater). The other is a horizontal-line triangle filler which is slower but copes with triangles partly outside the screen. Faster version of project available at: http://phosphorus.github.io/#69470210
