This is completely unoriginal. There is a game exactly like this but better called Motherload made by XgenStudios and it's the exact same purpose and design.
I never truly knew why mammoths went extinct, or why elephants have lasers attached to them, or that living things spoke english, until now.... This game has truly been a revelation.
A couple things I think would make this game even greater.
1. A giant map of the world
2. A teleport to town option
3. Icons that showed status defects
4. Able moves are highlighted
5. Once items are equipped it doesn't show in the inventory
That's all! Great game! 5/5 for effort!