Small collisions update

I was on holiday last week so didn't get much done but here's what I did get done:

• updated collisions so that npcs or obstacles that have a collider component actually do something when there's a collision (the green car now stops in the video)
• added a way to update the render order of the player sprite depending on position relative to other objects in the scene. For example with the green car, when the player is 'behind' the green car it is rendered first so is rendered beneath the green car, when the player is 'infront of' the green car it is rendered after the green car so looks like it's infront of it
• npcs can now go offscreen (before everything was just clamped) and anything that is offscreen is now 'inactive' and so doesn't get rendered
• just had fun drawing some people npcs

Next jobs:

• I actually want to focus on the art for a little bit just so I don't hate how it looks so I want to : pick a colour palette and recolour what I've got (so far it's just been totally random colours and so looks quite messy), draw some more shops, objects,npcs. 
• I have no experience with pixel art so it might take me a little while, after I've done that I'll get back onto the technical things!