Graphical changes

Thanks to Aelxan now I have a better sprite for the main character. I've also made a new wall texture for the blocks and the result is better than the previous version. The next step is adding a simple background. Here you can see 2 comparative images:

I've also tried adding background music (Cave) made by Miguel Herrero.

As for the last post's list, I've finished the coding for the starting and ending doors, I just need to made a sprite for them.