I want a game in Construct 2 to be modified

I am looking for a developer that is specialised in Construct 2. I have an existing game (incl. source code) that needs to be modified. Please check the pdf for details: [login to view URL] This is a picture of the elements: [login to view URL] I explained it also in a video: [login to view URL] Please let me know your fixed price for creating the game (main screen / high score screen / user area etc) and when you can complete the job.