tinker with display timings, use keyboard button names

The "X button" and "O button" characters look really awful in Monogram
with the shadow treatment I'm giving them, so let's not.

vacation.p8

@@ -668,9 +668,9 @@ zonk_mode = {
  --text mode
  txmd=0x81,
  --text spring-in distance
- txd=10,
+ txd=8,
  --text spring-in frames
- txf=20,
+ txf=15,
  --exit frames
  exf=60,
  --exit magnitude
@@ -1826,7 +1826,7 @@ center:9:20
 iF YOU WOULD LIKE TO
  >#STOP AT ANY TIME,
 FOR ANY REASON, HOLD
- #x OR #o. tHIS HALTS
+ #x OR #z. tHIS HALTS
 >THE GAME AND STARTS
     AN AWAKENER.
 -----
@@ -1868,7 +1868,7 @@ center:2:10
 DOWN: DIVE]],
     txd=0,
     txf=1,
-    exf=15,
+    exf=30,
     cmul=0.25,
     hide_stripes=true,
    }},