Build a Simple Game with HTML5, Mobile and Desktop

Hello, I am in need of a "simple" HTML5 game. I am a web developer but this falls out of my scope. The overall premise of the game is 2D platformer. The objective of the game is for the character to collect 8 icons which are flung across the screen (from the right). The icons come across the screen randomly , there should be plenty of chances for the user to collect each icon. The character can only jump with space bar (or screen touch on a mobile device), the character does not have the ability to move left/right. There will be a variety of platforms - some high, some low - that work their way across the screen, and a background (to be provided) which parallax scrolls at a certain speed. There will be a time limit on the game (possibly 60 seconds, unsure yet). If the user fails, they get the option to retry. There should also be 8 icons on the game somewhere, which are greyed out until the user collects the corresponding icon, upon which it lights up. If the user gets all the 8 icons within the time limit, they enter their email address (and possibly name). This data should be stored and a leaderboard maintained with the quickest time. The user shoud be able to "share" their score with social media, facebook etc. The game should look good on a desktop, not pixelated. So I’m assuming we’ll need it to be minimum 1280x720 (wide)., or vector based game? I am envisaging creating the character, and backgrounds, theme etc. Then these being implemented / adapted by the coder. I've tried to look for something similar to show you but all I could find was this: [login to view URL], but... this game should include moving spinning badges for the user to collect, there should also be more platforms available - i.e. 4 or 5 different levels. I hope I've given enough information for a price estimate. The project should be completed by the 22nd April. There is a possible extension depending on how the rest of the project goes. Thank you