This is a liberated game: it was originally sold as shareware, but on 19 July 2007 developer John Pallett-Plowright made the registered version available as freeware under the Creative Commons Attribution-NoDerivs 3.0 License.
Enter the following codes to cheat (press and hold all of the keys at the same time):
P-O-J-A: Gives you a javelin at any stage
T-I-M: Full missiles
Description by VGTips