1.) Take out some of the mario maps and add in diffrent maps
I think there are way to many mario maps and not enough or not any maps for the characters you have.
2.) Some power ups
I know there are some on the way but what about some power ups the increase your speed/decrease your speed or maybe a double health Item that it take you being touched twice by the It person to be frozen or a ultimate Ice blast with only one shot that locks on it the closest non IT and freezes them for the rest of the game.
3.) GAME MODE: Ultimate Freeze Tag
A game mode that takes the challange of this game to a new level. This mode is played on its own map that cannot be played on any other mode. Unlike the other game modes there are safety zones for non ITs to enter making it hard to win. safety zone could create paths for only non ITs to enter or maybe an area that hold a hidden item. Instead of the 500 seconds to play its 1200 because of how hard this can become. Another thing in this mode that I have said before is the switch. When someone hits a switch or hits a block somthing on the map changes. For example. maybe a wall opens up making it easyer to avoid the person IT or it may become a bad thing by instantly taking them out of the game making it easyer for the IT person to win the match.
Still thinking of more things for this.
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All I have so far...