Warlock is a simple 2D sprite game, move your warlock around the level avoiding the bad guys. Collect the keys, get to the exit.. Its the first in what will probably be a series of 40 hour developments.
You can download it here. The zip contains an executable Jar and a set of levels. In windows you should be able to double click on the jar. Everywhere else you'll probably have to do something like:
java -jar warlock.jar
You'll also need the latest Java Runtime Environment (JRE) to run it.