This was my extremely early attempt at a cloning Yars’ to the ZX81. I wasn't very good at developing yet and it is clear this game will win no awards. Yet, it did play a small part in my growth as a developer.
Use cursor numbers to move (5,6,7,8) and Z to fire.
JSZeddy, by Erik Olofsen based on JSSpeccy and Z81 emus.
For programs that don’t auto-run, press R then ENTER.
Also you may need to click on the applet to enable keyboard entry.