
*Vile stops in mid air to throw his fire bomb attack. It then immediately switches to his final version sprite. *Vile's sprite after he gets ejected from the Ride Armor is different.

*Vile's first Ride Armor is blue instead of gray like in the final game. *Gravity Beetle's giant blackhole will not always be spawned at the screen's center, it can also completely devour the top of the walls, which makes the fight harder. *Different background in Gravity Beetle's stage. *Volt Catfish's sprites are entirely different. *Tunnel Rhino won't knock you off the wall if he charges into it. *Tunnel Rhino's miniboss wheels lack animations. Spikes also look different, as does the platform where the Heart Upgrade is. *Extra background elements in the beginning of Tunnel Rhino's stage. *Different background elements in Tunnel Rhino's stage (Large pipes). *There is no miniboss in Toxic Seahorse's stage! The room is not yet there. *Minor stage graphic differences, for example ladders in Toxic Seahorse' stage. *Toxic waste lacks transparency on Toxic Seahorse's stage. *No password screens after beating the bosses.

The wireframe of the weapon is white instead of green like in the final version. Also, there is no demostration of the weapon.

*X's picture doesn't change color during the "Weapon get" screen. *The Doppler logo in the Maverick's life bar is slightly different. *Graphical glitches on Buffalo's ice attacks. It's annoying, it makes you vulnerable and stops the game for a few seconds. In fact, this "hurt" animation also plays if hit by the body of certain enemies, like the two legged missile launchers. This doesn't happen in the final version. *X will fall to his knees, hurt, when hit by Blizzard Buffalo's charging attack. *Different snow effect in Blizzard Buffalo's stage. *No miniature previews of each stage on the selection screen.

*Spotlights in the first level are static. Ok, I've been checking the prototype out.
