Honestly, it doesn't really matter what name you give your game. "Deadly world" is perfectly fine. (There are games called "VVVVVV", "SimCity", "Minecraft", "0x10c", ... and these are just a few really famous examples. You can pick any name you want. (As long as it's not already taken of course.))
Okay, here's what you can do best: make the game, with shitty textures (I do it all the time). Then, when it's done, ask others if they want to make some textures for your game. Make it as easy as possible for them to contribute.
If you run into problems making the game, then stop and make a simpler game. Like ten times simpler. Finish that first. You'll learn important stuff. Each time you find out you don't have enough skills yet to make the game you're making at that moment, stop and make a simpler game. Each time you finish a game and it works and everything, make a slightly more complicated one. At some point, you'll have the skills needed to make the game you really want to make. Good luck.
