2023 09 15 - fail state and core loop (windows only)

a new version now available, but windows only at the moment.

some small but significant changes, as a more complete game loop is starting to take shape:

1.  fail state: if you run out of green tiles (all eaten by monster) game has a fail state.
2.  objective and level complete state:  added a "fuel cell" item type, which creates an objective for the level.  Without letting a monster eat all your green pools and end your run, you need to...  
   1. Find a fuel cell
   2. drop the cell on green tiles you created to absorb their charge. 
   3. place the fuel cell on the starting point to bank the charges and end the level.  
   4. you can then restart the level for your next loop through the world. a new fuel cell will be placed out in the darkness to try and retrieve.
3. world building: added a tutorial/world building "wreckage" item type, which is used to place downed pieces of your ship across the map. the items do not impact gameplay, but provide story and/or introduce game mechanics.

in progress, but not completed roadmap items:

1.  started implementing an 'upgrade' ability on the floor tiles you create. 
   1. drop more red/yellow/blue on to green/orange/purple to upgrade them to +1, +2 power.  Additional power has no effect as of now, but will lead to new abilities.
2.  future state: charges banked at the starting point will allow you to upgrade your suit.
   1. suit upgrades will help you explore further out into the abyss