HTML and Update

I managed to get the game running on HTML so I uploaded the whole project as an in-browser game. I still left the downloadable Windows version in case someone wants to download it.

I also updated some things. I updated the boss sprite so it is clear when it's defeated and added a small animation to it. I also updated its HP so it doesn't take as many hits since I believed I went overboard in that aspect. 

I made a box in the end screen so the final score and a restart button are better displayed.