fix Galactic Armada: player MoveUp broken (fix #147)

Supersedes #148

Co-authored-by:  Michael R. Cook <work.mrc@pm.me>

Author: avivace

galactic-armada/src/main/states/gameplay/objects/player.asm

@@ -234,9 +234,9 @@ MoveUp:
     sub PLAYER_MOVE_SPEED
     ld [wPlayerPositionY], a
 
-    ld a, [wPlayerPositionY]
+    ld a, [wPlayerPositionY+1]
     sbc 0
-    ld [wPlayerPositionY], a
+    ld [wPlayerPositionY+1], a
 
     ret