T-32k is a clone of the 1990 Amiga game 'Turrican'. The concept is simple--shoot the bad guys and collect power-ups to improve your weapon. The music is decent, and the graphics are nothing special but get the job done.
You will find that this game is fairly short. This is because it was created for a competition in which the games must be under 32 kilobytes in size. Despite this shortcoming, the game is excellent. Who would have thought you could pack this much fun into 32kb?