Ranble

Ranble is a take on the classic Scramble-style arcade game. It has a constantly changing random terrain (hence the name 'Ran(dom)-(scram)ble'), covered in a variety of buildings, fuel tanks and missiles. As the game progresses, the terrain graphics change to indicate a new level - each level also has a variety of attacking aliens (from horizontal missile attacks, zig-zagging saucers and bouncing aliens) and the frequency of various elements on the terrain change (i.e. less fuel tanks, more missiles, etc) to make it harder.

The program is free, and its code and graphics can be edited/modified or just used to learn from.