This is a sub-page of Antonblast/Unused Sprites/Unused Backgrounds.
The menu background as seen in the Kickstarter demo. This would be replaced by the static background in the Dynamite Demo.
The menu background from the Kickstarter demo, but darker and with crudely drawn stars on it. This was meant as a placeholder for Freako Dragon's fight, but none of the phases take place in space. In fact, the only boss that DOES take place in space (sort of), is Ring-a-Ding's second phase, during the ascension.
A copy of the sky background of the Kickstarter demo's Boiler City. It's listed as bg_titleDrop.
A colorless, frontal view of Brulo's Casino that's been sitting in the files since the Kickstarter demo. Interestingly, it bares more of a resemeble to its appearance from Antonball Deluxe, as seen in the Antonball opening cutscene.