diff --git a/main.c b/main.c
index a224430..7a998b4 100644
--- a/main.c
+++ b/main.c
@@ -152,6 +152,15 @@ static long last_nsec = 0;
 
 #define NS_PER_TICK 30000000
 
+/* FIXME this is just temporary */
+void in_bounds(void)
+{
+	if (player_x < 0) player_x = 0;
+	if (player_y < 0) player_y = 0;
+	if (player_x > screen_width - 50) player_x = screen_width - 50;
+	if (player_y > screen_height- 50) player_y = screen_height - 50;
+}
+
 void tick(void)
 {
 	/* run every N milliseconds... nanoseconds? idk */
@@ -171,6 +180,7 @@ void tick(void)
 	player_vy += player_ay;
 	player_x += (int)player_vx;
 	player_y += (int)player_vy;
+	in_bounds();
 	draw_entities();
 }