New 2d Simple Multiplayer Unity Game

I've had an idea for a while to make a game called 'Tag', where literally you have to refrain from being tagged/ touched by your opponent (just like the universal playground game). This is how it works: 1) A point system could be adopted so the winner is the player who has the LEAST points (is tagged the least) 2) There would be a time limit (of 5 mins or something) and whoever is 'it' when the time is up gets 2 points added to their score. 3) It must be extremly fun and cartoony, with a big focus on the distinct characters (fat ones, cool ones, thin ones etc) and cool level designs. (A big house? playground?, supermarket? jungle? etc) 4) Despite the different characters, they should all run at the same speed, are there will be power-up such as boosts/ slow-downs to make things more interesting (as well as the level terrains). 5) I see it could work as a 2d platformer (but the levels can't be too small) or also a 3d game. Happy bidding and lots more jobs for the winner of this. Please tell me the exact timeline to make game I dont mind if you reuse other peoples libraries etc for 2d or image stuff.