Reduce player speed and flip sprite

src/main.s

@@ -10,6 +10,10 @@ rept $150 - _entry
     db 0
 endr
 
+SECTION "Frame", WRAM0
+
+frame:: db
+
 SECTION "Code", ROM0
 
 start:
@@ -50,6 +54,9 @@ start:
     ld [hl], %11100100
 
 .loop:
+    ld hl, frame
+    inc [hl]
+
     call Keys_Update
     call Player_Update
 

src/player.s

@@ -6,13 +6,6 @@ Section "Player Data", WRAM0
 playerWorldX: dw
 playerWorldY: dw
 
-; Sprite data
-playerSprite:
-playerScreenY: db
-playerScreenX: db
-playerTileIndex: db
-playerFlags: db
-
 Section "Player Code", ROM0
 
 spriteData:
@@ -45,6 +38,13 @@ Player_Init::
     ret
 
 Player_Update::
+    ; Only update every 2 frames
+    ld hl, frame
+    ld a, [hl]
+    and %1
+    cp %1
+    jr nz, .done
+
     ld hl, keys
     ld b, [hl]
 
@@ -59,8 +59,10 @@ Player_Update::
     cp 160
     jr nc, .done
 
-    ld hl, _OAM + 1
+    ; Update x-position and set x-flip = false
     inc [hl]
+    ld hl, _OAM + 3
+    res 5, [hl]
 
 .left:
     ; check for left button
@@ -74,7 +76,10 @@ Player_Update::
     cp 9
     jr c, .done
 
+    ; Update x-position and set x-flip = true
     dec [hl]
+    ld hl, _OAM + 3
+    set 5, [hl]
 
 .done:
     ret