Updated readme

README.md

@@ -49,6 +49,9 @@ By default it will start Level I Basic.  To use the other rom, add the option
 `--rom binaries/trs80/level2.rom`
 
 ![alt text](images/trs-80-level-ii-basic.png)
+The characters are being drawn pixel by pixel (6x8) using characters I drew
+using [this handy website](https://maxpromer.github.io/LCD-Character-Creator/).
+They aren't a perfect match of the characters used by the TRS-80
 
 Sega Genesis/MegaDrive
 ----------------------
@@ -72,11 +75,13 @@ emulator currently renders the whole frame at once instead of line by line, so
 changes that should be made while the screen is updating don't show up
 ![alt text](images/sega-genesis-sonic2-title.png)
 
-In the first one, it's mostly working but the bottom of the clouds should be a
-different colour.  Highlight/Shadow colours are not yet supported
+The game play is mostly working but the bottom of the clouds should be a
+different colour, probably because highlight/shadow colours are not yet
+supported.  The time in the upper left corner also doesn't seem to progress
 ![alt text](images/sega-genesis-sonic2-start.png)
 
-I'm not yet sure why the clouds in the background are cut off suddenly
+I'm not yet sure why the clouds in the background are cut off suddenly.  They
+change in a glitchy way when you move around
 ![alt text](images/sega-genesis-sonic2-bridge.png)
 
 There are some graphics glitches in Earthworm Jim, but it's almost playable if it