darena sprites

src/uxn_tutorial_day_2.gmo

@@ -753,9 +753,18 @@ BRK
 
 note that in this case, the INC-X and INC-Y macros increment each coordinate by 0008: that's the size of the tile.
 
-# responsiveness
+## flipping experiments
 
-TODO
+because the square sprite is symmetric, we can't really see the effect of flipping it. 
+
+here are the sprites of the boulder/rock and the character of {darena}:
+
+```
+@rock 3c4e 9ffd f962 3c00 
+@character 3c7e 5a7f 1b3c 5a18 
+```
+
+i invite you to try using these sprites instead to explore how to draw them flipped in the different directions.
 
 # designing sprites
 
@@ -763,6 +772,10 @@ TODO
 
 => https://wiki.xxiivv.com/site/nasu.html nasu
 
+# responsiveness
+
+TODO
+
 # drawing 2bpp sprites
 
 TODO