Trying to tweak the collision but just wasting time

[mattyjbrown]

I went a bit down the rabbit hole - I wanted to stop you from being able to walk through walls, so we could have a door to the next screen.

Then I went down the rabbit hole for a while - turns out collision is hard.

So for now it just forbids X movement if you would end in a wall.

• [x] Other characters collidable
• [x] Maybe a little X bounce back
• [ ] Not fall through floors after a period of inactivity (high delta?)
• [ ] Jump height depends heavily on framerate