Zarby's arrow code, will need to be made configurable

probably just based on cost per arrow, or a flag and word for each
cost, silvers/wooden

retro.asm

@@ -0,0 +1,27 @@
+CheckEnoughRupeeArrows:
+{
+    LDA $0B99 : BNE .minigame_arrow
+    PHX ;save X value which is ancilla of the arrow
+    REP #$30 ;Set 16bit mode
+    LDA $7EF340 : AND #$00FF : TAX ;check what bow we have
+    LDA $7EF360 : CMP.l .rupees_cost, X : BCC .not_enough_rupees ;Load Rupees count
+    SBC.l .rupees_cost, X : STA $7EF360 ;decrease rupee by 5
+
+    SEP #$30
+    PLX
+    BRA .ignore_minigame
+    .minigame_arrow
+    DEC $0B99
+    .ignore_minigame
+    LDA #$01 ;return 01 if we have enough rupee so it doesnt despawn the arrow
+    RTL
+
+    .not_enough_rupees
+    SEP #$30
+    PLX
+    LDA #$00 ;Return 00 if we don't have enough rupee so it despawn the arrow
+    RTL
+
+    .rupees_cost ;Normal, Normal, Silver, Silver
+    dw #$0005, #$0005, #$000A, #$000A
+}