Add images to README

Add README

Fix sand-teleporting bug

Add box art

Prevent crashes when using large pen sizes

Add release rule

Add dist folder

Temporarily fix release builds

The strangest thing is happening. When using the -0z compilation flag,
the left mouse menu selection doesn't work, but the right mouse does.

To temporarily work around this issue, I'm using -O0 which leaves me
with a 8kb cart instead of a 5kb cart.

Fixes: https://todo.sr.ht/~colbyhub/pocket_dust-issues/27

Hide gamepad overlay

Implements: https://todo.sr.ht/~colbyhub/pocket_dust-issues/28

Update Makefile to latest version

Add accurate cursor colors

Implements: https://todo.sr.ht/~colbyhub/pocket_dust-issues/26

Add play/pause functionality

Now we can control time itself. The implementation of this is not super
clean but there's not much time left on the clock.

Implements: https://todo.sr.ht/~colbyhub/pocket_dust-issues/15

Fix water from not spawning

Fix cursor alignment

Classic off-by-one.

Reduce water escapism

Fix stuck particle bug

I spent too much time trying to fix this.

Fixes: https://todo.sr.ht/~colbyhub/pocket_dust-issues/17

Remove redundant movement calls

Add better water

Lots of effort went into figuring out how to make more realistic water.
Look at the other "strange-water" branches for examples of lightening
and other strange effects.

Fixes: https://todo.sr.ht/~colbyhub/pocket_dust-issues/23

wip

Add better lava flow

Now lava moves more slowly in all directions. This may have introduced
some water jank (see tidal waves).

Implements: https://todo.sr.ht/~colbyhub/pocket_dust-issues/21