diff --git a/.gitignore b/.gitignore
index 66e59bb..8fba90f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ JTMM2.g*a
 levels/0.jtmm2
 src/gen_levels.c
 *.sublime-*
+JTMM2_preview_*.zip
diff --git a/include/player.h b/include/player.h
index 186a8ee..c517ec7 100644
--- a/include/player.h
+++ b/include/player.h
@@ -1,8 +1,6 @@
 #ifndef _DEF_PLAYER
 #define _DEF_PLAYER
 
-#include <stdbool.h>
-
 #include "vec.h"
 
 typedef struct Player {
diff --git a/src/player.c b/src/player.c
index ec5dd09..a76b7fc 100644
--- a/src/player.c
+++ b/src/player.c
@@ -10,8 +10,8 @@
 
 /* TODO: Determine FRICTION and ACCELERATION from UPS. */
 #define MAX_SPD (64 * PXS)
-#define FRICTION 0.9
-#define ACCELERATION (MAX_SPD * (1 - FRICTION))
+#define FRICTION (0.95)
+#define ACCELERATION (int)(MAX_SPD * (1 - FRICTION))
 #define GRAVITY PXS
 #define JUMP_SPD (-128 * PXS)
 #define GRACE_UNITS (int)(UPS / 5)