Thanks for the reply.
To simply put my questions:
1. I wanted a license so that I could protect my code and nothing more to it.
2.I know that my game has got a very bad UI design and at the bottom at graphics. By asking a game which could be sold, I just meant that I want to learn pro- development.
The reason I made my game in canvas was because I didn't have any guidance of what I should use. Ijust went to w3 schools and learnt the command usage of canvas and did it. Now, if I were to improve my UI design and graphic skillls, I don't know what I should learn? A lot of names like phaser, pixi etc., are present in this forum. I just wanted to ask from your experience, what would you consider to be the best for game development.
As far as my game goes, there are keyboard controls(W - Up, A - Left, S - Down, D - Right, Shift - Pause, Enter - Resume)