The first game that Luke and Peter made together many years ago was simple remake of Boulder Dash. In this game player diggs the tunnels to find diamonds. He runs away from danger like monsters and falling stones or diamonds. There was no next lives and levels order. Death or timeout ended the game. Collection of all diamonds in time caused jump to randomly picked new level.
As you can see, it wasn't big production. ;) But there was a lot of fun to make this. Menu - always the first part of game! Config loading, bitmap loading, levels loading - easy. Player moving - first bit of life in game. Falling stones and diamonds - look out what are you doing. Moving monsters - some bug makes them teleport, so they were unpredictable. Explosion when something fall on the monster - like special effects. Score bar, 'game over' label, credits inscription and game was finished.
Yes, good old arcade times.