Realistic 2D Game Art Assets

I am an indie developer working on a game called Resign Idle in Unity. It is a comedic/satirical clicker game about surviving terrible work shifts, managing fatigue, and building up enough anger to finally quit... (Budget: £20 - £250 GBP, Jobs: 2D Game Art, Character Design, Concept Art, Digital Art, Game Asset Creation, Graphic Design, Illustration, Visual Design)