Full FREE PLAY item reel

All items in the game are put into the FREE PLAY item reel, instead of the fake "time attack" behavior. Everyone's already just turning off items to get a particular one, so turn it into a feature.

Tutorials are specifically set to be unaffected.

src/k_roulette.c

@@ -1356,7 +1356,7 @@ void K_FillItemRouletteData(const player_t *player, itemroulette_t *const roulet
 	}
 	else if (K_TimeAttackRules() == true)
 	{
-		kartitems_t *presetlist = K_KartItemReelRingSneaker;
+		kartitems_t *presetlist = NULL;
 
 		// If the objective is not to go fast, it's to cause serious damage.
 		if (battleprisons == true)
@@ -1367,11 +1367,56 @@ void K_FillItemRouletteData(const player_t *player, itemroulette_t *const roulet
 		{
 			presetlist = K_KartItemReelSPBAttack;
 		}
+		else if (gametype == GT_TUTORIAL)
+		{
+			presetlist = K_KartItemReelRingSneaker;
+		}
 
+		if (presetlist != NULL)
+		{
 			for (i = 0; presetlist[i] != KITEM_NONE; i++)
 			{
 				K_PushToRouletteItemList(roulette, presetlist[i]);
 			}
+		}
+		else
+		{
+			// New FREE PLAY behavior;
+			// every item in the game!
+
+			// Create the same item reel given the same inputs.
+			P_SetRandSeed(PR_ITEM_ROULETTE, ITEM_REEL_SEED);
+
+			for (i = 1; i < NUMKARTRESULTS; i++)
+			{
+				if (K_ItemEnabled(i) == true)
+				{
+					spawnChance[i] = ( totalSpawnChance++ );
+				}
+			}
+
+			while (totalSpawnChance > 0)
+			{
+				rngRoll = P_RandomKey(PR_ITEM_ROULETTE, totalSpawnChance);
+				for (i = 1; i < NUMKARTRESULTS && spawnChance[i] <= rngRoll; i++)
+				{
+					continue;
+				}
+
+				K_AddItemToReel(player, roulette, i);
+
+				for (; i < NUMKARTRESULTS; i++)
+				{
+					// Be sure to fix the remaining items' odds too.
+					if (spawnChance[i] > 0)
+					{
+						spawnChance[i]--;
+					}
+				}
+
+				totalSpawnChance--;
+			}
+		}
 
 		return;
 	}