diff --git a/game.c b/game.c
index 65060c7..1737c17 100644
--- a/game.c
+++ b/game.c
@@ -6,6 +6,7 @@
 #include "teyaku.h"
 #include "dekiyaku.h"
 #include "field_multiplier.h"
+#include "play.h"
 
 Vector2 mouse_pos;
 char teyaku_calculation[400];
@@ -118,6 +119,33 @@ void handle_input(Game *g) {
 	  }
 	}
       }
+
+      Card *selected_card = NULL;
+      for (int i = 0; i < g->player_hand.count; i++) {
+	if (g->player_hand.cards[i]->selected) {
+	  selected_card = g->player_hand.cards[i];
+	  break;
+	}
+      }
+
+      for (int i = 0; i < g->field.count; i++) {
+	if (point_within_card(g->field.cards[i], mouse_pos)) {
+	  if (selected_card == NULL) printf("No card selected, whoops");
+	  if (valid_play(&g->field, selected_card, g->field.cards[i])) {
+	    printf("Valid\n");
+	  } else {
+	    printf("Invalid\n");
+	  }
+	}
+      }
+
+      if (CheckCollisionPointRec(mouse_pos, next_card_position(&g->field))) {
+	if (valid_play(&g->field, selected_card, NULL)) {
+	  printf("Valid\n");
+	} else {
+	  printf("Invalid\n");
+	}
+      }
     }
     break;
   default:
diff --git a/play.c b/play.c
index 4d777eb..d12c362 100644
--- a/play.c
+++ b/play.c
@@ -6,7 +6,7 @@ bool valid_play(Hand *field, Card *played, Card *target) {
   if (target == NULL) {
     bool matching_month_in_field = false;
     for (int i = 0; i < field->count; i++) {
-      if (field->cards[i]->month == target->month) {
+      if (field->cards[i]->month == played->month) {
 	matching_month_in_field = true;
 	break;
       }