Implements #13 and #14

Removes deaths and time as separate game-modes, and instead always tracks records.
Adds two proper game-modes. One inverts the player's controls, and the other randomly inverts the player's controls every 7 seconds.
Saves cleared status and records for each game-mode separately
Only allows 0-1 for the horizontal velocity
Requires arenas in arena groups to be cleared in sequence on all game-modes, not just the default one.

src/main/java/net/knarcraft/dropper/command/EditArenaCommand.java

@@ -120,7 +120,7 @@ public class EditArenaCommand implements CommandExecutor {
         }
 
         // If outside bonds, choose the most extreme value
-        return Math.min(Math.max(-1, velocity), 1);
+        return Math.min(Math.max(0.1f, velocity), 1);
     }
 
     /**

src/main/java/net/knarcraft/dropper/command/JoinArenaCommand.java

@@ -76,9 +76,10 @@ public class JoinArenaCommand implements CommandExecutor {
             return false;
         }
 
-        // Make sure the player has beaten the arena once before playing a challenge mode
-        if (gameMode != ArenaGameMode.DEFAULT && specifiedArena.getData().hasNotCompleted(player)) {
-            player.sendMessage("You must complete this arena in normal mode before starting a challenge!");
+        // Make sure the player has beaten the arena once in normal mode before playing another mode
+        if (gameMode != ArenaGameMode.DEFAULT &&
+                specifiedArena.getData().hasNotCompleted(ArenaGameMode.DEFAULT, player)) {
+            player.sendMessage("You must complete this arena in normal mode first!");
             return false;
         }
 
@@ -112,18 +113,20 @@ public class JoinArenaCommand implements CommandExecutor {
      */
     private boolean doGroupChecks(@NotNull DropperArena dropperArena, @NotNull DropperArenaGroup arenaGroup,
                                   @NotNull ArenaGameMode arenaGameMode, @NotNull Player player) {
-        if (arenaGameMode == ArenaGameMode.DEFAULT) {
-            if (!arenaGroup.canPlay(player, dropperArena.getArenaId())) {
-                player.sendMessage("You have not yet beaten the previous arena!");
-                return false;
-            }
-        } else {
-            if (arenaGroup.hasBeatenAll(player)) {
+        // Require that players beat all arenas in the group in the normal game-mode before trying challenge modes
+        if (arenaGameMode != ArenaGameMode.DEFAULT) {
+            if (!arenaGroup.hasBeatenAll(ArenaGameMode.DEFAULT, player)) {
                 player.sendMessage("You have not yet beaten all arenas in this group!");
                 return false;
             }
         }
 
+        // Require that the player has beaten the previous arena on the same game-mode before trying this one
+        if (!arenaGroup.canPlay(arenaGameMode, player, dropperArena.getArenaId())) {
+            player.sendMessage("You have not yet beaten the previous arena!");
+            return false;
+        }
+
         return true;
     }
 

src/main/java/net/knarcraft/dropper/command/JoinArenaTabCompleter.java

@@ -23,8 +23,8 @@ public class JoinArenaTabCompleter implements TabCompleter {
         } else if (arguments.length == 2) {
             List<String> gameModes = new ArrayList<>();
             gameModes.add("default");
-            gameModes.add("deaths");
-            gameModes.add("time");
+            gameModes.add("inverted");
+            gameModes.add("random");
             return gameModes;
         } else {
             return new ArrayList<>();