Developing a Platformer in Java with Slick2D

About a month ago, I posted some youtube videos showing a technology demo that I did to learn how to do game development in Java.

This first one shows the technologies that I used: Java, NetBeans IDE and Slick2D.  It is probably the more coherent of the two although the game was in an earlier state.

The second video shows the game at a point where there were enemies, some kind of accounting for hit and mana points and the beginnings of some strategy.  It is, however, the less coherent of the two.