Simple enhancements for Video Game Project (2D Unity environment) !

Hello Freelancers ! The current project is devoloped in a 2D Unity environment and the programming language used is C#. The project is already at a good level, but I need some simple enhancements . The game is pretty basic (as you will see) and you can find the whole description at the attached doc. What I request are the following tasks : 1. Schedule the hero's health bar so that: · When he touches an obstacle to lose his energy gradually · When he touches a coin to completely fill his health bar · When he shoots and kills an object (after 3 attempts) to gradually increase his health bar · When his energy is completely finished, the game must reach its end (game over). 2. When altering new level the overall score should be maintained. The link to the code -so far- is also at the attachments ! For any further info, feel free to contact me. Thanks !