diff --git a/rogueviz/ads/ds-game.cpp b/rogueviz/ads/ds-game.cpp
index 344805dc..b1b3d838 100644
--- a/rogueviz/ads/ds-game.cpp
+++ b/rogueviz/ads/ds-game.cpp
@@ -405,15 +405,16 @@ bool ds_turn(int idelta) {
     current.T = lorentz(3, 2, -tc) * current.T;
 
     auto& mshift = main_rock->pt_main.shift;
-    if(mshift) {
+    if(mshift && !isnan(mshift)) {
       #if RVCOL
       constexpr ld win_time = 60;
-      if(current.shift < win_time && (current.shift + mshift) >= win_time && !game_over && no_param_change)
+      if(pdata.score[0] < win_time && (current.shift + mshift) >= win_time && !game_over && no_param_change)
         rogueviz::rv_achievement("DSGAME");
       #endif
       current.shift += mshift;
       current.T = current.T * lorentz(2, 3, mshift);
       mshift = 0;
+      pdata.score[0] = max(pdata.score[0], current.shift);
       }
     fixmatrix(current.T);
     
diff --git a/rogueviz/ads/globals.cpp b/rogueviz/ads/globals.cpp
index 07e184b6..b813694e 100644
--- a/rogueviz/ads/globals.cpp
+++ b/rogueviz/ads/globals.cpp
@@ -81,7 +81,7 @@ struct player_data {
   int ammo;
   ld fuel;
   ld oxygen;
-  int score[score_types];
+  ld score[score_types];
   };
 
 ld ads_how_much_invincibility = TAU / 4;
diff --git a/rogueviz/ads/hiscore.cpp b/rogueviz/ads/hiscore.cpp
index e6b9d54d..081bd655 100644
--- a/rogueviz/ads/hiscore.cpp
+++ b/rogueviz/ads/hiscore.cpp
@@ -19,7 +19,6 @@ void fill_gamedata() {
   char buf[128]; strftime(buf, 128, "%c", localtime(&timer)); cur.timerend = buf;
   cur.seconds = int(timer - timerstart);
   for(int a=0; a<3; a++) cur.scores[a] = pdata.score[a];
-  if(main_rock) cur.scores[0] = current.shift;
   shstream hs;
   print(hs, main_rock ? "2 " : "1 ");
   print(hs, DS_(simspeed), " ", DS_(accel), " ", DS_(how_much_invincibility), " ", vid.creature_scale, " ", DS_(missile_rapidity));
diff --git a/rogueviz/ads/resources.cpp b/rogueviz/ads/resources.cpp
index cb09011a..0aae02c8 100644
--- a/rogueviz/ads/resources.cpp
+++ b/rogueviz/ads/resources.cpp
@@ -107,7 +107,7 @@ void display(int id, int y, ld val, ld maxv, ld tank, ld unit) {
   
   if(maxv == 0) {
     string s;
-    if(main_rock) s = hr::format(tformat, current.shift);
+    if(main_rock) s = hr::format(tformat, pdata.score[0]);
     else s = its(val + .5);
 
     queuestr(sta, ctr, 0, 20, s, col >> 8, 1, 0);