Fix encoding of physics constants

src/player.s

@@ -27,8 +27,8 @@ DEF SPRITE_WIDTH EQU 2
 DEF SPRITE_HEIGHT EQU 2
 DEF PLAYER_SPEED EQU 2
 
-DEF GRAVITY EQU (0 << 8) | 8
-DEF INIT_VY EQU (2 << 8) | 40
+DEF GRAVITY EQU (0 << 8) | $2e ; 0.18
+DEF INIT_VY EQU (3 << 8) | $99 ; 3.60
 
 Player_Init::
     ; Clear player data