Blend of Retro Jam 2

The Blend of Retro Jam 2 is a game jam based on a blend of Retro, CGA Inspired colour palette with OG Gameboy Limitations. That's Resolution and how many colours can be displayed at once. 

(RULES)
-Z,X, WASD, Up, Down, Left, Right. (The arrow keys are exchangeable with WASD, You can only use one or the other, not both. MOUSE IS FORBIDDEN)
-https://lospec.com/palette-list/system-mini-16, you must use that colour palette with only 4 of these colours allowed on the screen at any one time  -160×144 pixels (10:9, OG GameBoy Res)
-The theme is completely optional!
-Premade assets are forbidden

The Theme

End of the world