How do i extend the stage longer

[Toki of Time]

I'm creating a stage that is from Contra the Hard Corps, but i'm having an issues on why is my stage doesn't move anywhere when i was supposed to extend the stage longer.

Picture will be here:

Colonel's/Alien's Laboratorial Experiment (as a background)


Machine Ground


How can i extend the stage longer when i can't move anywhere what i was supposed to see?

[Excahm]

Dont get it to your question maybe could u be more expecific?

AS i read could be just the Leftbound and Rightbound arent increased.

[Toki of Time]

Tried to increase left and right bound, yet in-game, it doesn't go any further. Maybe i will show you my video on why it doesn't go any further when i increased bound left and bound right.