Dragon Pixel is a game that I have developed in my early java days.
This is one of my very first projects that I started developing in java with use of my starters expertise. I started working on this around 2010 and spend about a month working on it.
I wouldn't recommend anyone to follow this coding structure as it's insufficient and also unreliable. The only reason to why I have chosen to publicly release the source code is because I think that some of the resources may be useful for others.
The map works of a tileset which can be found inside of res/Maps/
There you are able to edit the maps tileset and the game would load it dynamically from the file.