Garbage Guardian

After the humanity's era, on a desert planet filled with waste, a man collects spare parts of robots to defend himself against hordes of attacking rats at night. 
How long will you last?  1 month,1 week ? 1 night ?

- N°1 : Quickly find robot parts in the landfill, you don't have much time before night falls.

- N°2 : Assemble the pieces on your bot to make it more capable of defending yourself

- N°3 : Watch him fight against a horde of furious rats. Observe the changes to be made to survive the next night.

Good Luck.