diff --git a/include/tiles.h b/include/tiles.h
index 96675fc..1245820 100644
--- a/include/tiles.h
+++ b/include/tiles.h
@@ -6,11 +6,17 @@
 typedef unsigned char Tile; /* the tile ID */
 typedef unsigned char Tile_flags; /* the tile properties (bitmask) */
 
-/* define flags */
-#define F_SOLID 0b1
-#define F_SPIKY 0b10
-#define F_ICE 0b100
-#define F_GLUE 0b1000
+/* flags enum and defines */
+enum {
+	I_SOLID,
+	I_SPIKY,
+	I_ICE,
+	I_GLUE
+};
+#define F_SOLID		(1 << I_SOLID)
+#define F_SPIKY		(1 << I_SPIKY)
+#define F_ICE		(1 << I_ICE)
+#define F_GLUE		(1 << I_GLUE)
 
 /* define properties */
 #define P_AIR		(0)
diff --git a/src/player.c b/src/player.c
index 80da904..703e419 100644
--- a/src/player.c
+++ b/src/player.c
@@ -73,9 +73,9 @@ void player_set_vars(Player *player, const Level *level) {
 		if (flags_ceil & cur_flag)
 			side_flags[i] |= D_CEIL;
 	}
-	/* apply modifiers TODO: Don't harcode this */
-	player_mod_ice(player, side_flags[2]);
-	player_mod_glue(player, side_flags[3]);
+	/* apply modifiers */
+	player_mod_ice(player, side_flags[I_ICE]);
+	player_mod_glue(player, side_flags[I_GLUE]);
 }
 
 void player_move(Player *player, const Level *level) {
diff --git a/src/player_modifiers.c b/src/player_modifiers.c
index ed40610..668b042 100644
--- a/src/player_modifiers.c
+++ b/src/player_modifiers.c
@@ -16,6 +16,7 @@ void player_mod_glue(Player *player, uint8_t sides) {
 	if (sides & (D_LEFT | D_RIGHT | D_CEIL)) {
 		player->spd.y = 0;
 		player->vars.gravity = 0;
+		player->vars.acceleration /= 2;
 	}
 }