From e3fae4da977856f5c953d9e3b3ea0bce51789a17 Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Mon, 6 Oct 2014 21:40:31 -0400
Subject: check for collisions against the (currently invisible) wall

---
 main.s | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/main.s b/main.s
index 6138de9..4b8e5d8 100644
--- a/main.s
+++ b/main.s
@@ -197,6 +197,25 @@ apply_direction:
   ADC head_x, y        ; head_x offset by 1 is head_y
   STA head_x, y
 
+check_collisions
+  LDA head_x
+  CMP #$18
+  BCC collision
+  CMP #$E8
+  BCS collision
+
+  LDA head_y
+  CMP #$18
+  BCC collision
+  CMP #$E8
+  BCS collision
+
+  JMP end_game_loop
+
+collision:
+  LDA #$00
+  STA game_state
+
 end_game_loop:
   RTS
 
-- 
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