Text Based game? Make it minecraft, but also a zombie survival. so you have to collect tools and blocks and you can easily make it will PHP or C++... i might actually do this.
You Should Be Creative And Make Your Own Type Of Game Like Nobody Has Ever Made Before I Agree With Sawine That Would Be Original And Creative You Could Try And Make A Mix Or Create Your Very Own Game And That Could Turn Out Very Bad Or Very Good So You Should Probably Go With A Mix.