Free Gameboy inspired background + tileset + Extras

Hello everyone.

This is part of unfinished work that includes:

- Layered looped background

- 16x16 Tileset

- Small Robots with very subtle (idle, detection, shooting and destroyed) animations.

- Door sprite inspired by early Metroid games

- Mostly finished Alien Computer sprite

- Unfinished character sprite with (idle, walk) animations

- Unfinished enemy sprite with no animations