1K Hires : Locomotion

[dr beep]

A new game in hires for the 1K ZX81.

This time it is LOCOMOTION. The train starts at the left down bottom and will move to the right. Your job is to guide the train back to the same location as where you start. You can do this by making a track for the train ahead of the train.

The game ends when the traintrack ends either by going out of screen, landing on the free field or a track that doesn't connect.

The original version had an extra field at the bottom, but the program was too large so now the game starts at 5,1.

The game uses almost all available memory. Still free is 2 bytes.

This game is the first to have a screensize that hasn't a boundary of 8 / 16 bytes AND is larger than 256 bytes.
During the display each next line is calculated but when the 256 boundary is crossed another calculation is made to fix the display on.

Controls are
QWERT up
ASDFG down
12345 left
67890 right
Start a new game with space.

EDIT: official release in the games-section. Game is OK as it is!