construct 2 game dev

I purchase this game script [login to view URL] However I require some changes 1. On character selection screen add 2 fields (name and age) this information should saved on someway for tracking purposes 2. At the end of each level when appear level finalization screen, i require appears some message each time a level is finished. 3. Remove some buttons from frontpage and help area 4. i create custom sprites and is required to replace the existing one. per script instructions the freelancer should have the game construct 2 license in order to made changes