The sprites look really great! I especially liked the bullet sprite and particles, I know they weren't the same as the death chase ones but they looked super nice!
I think my biggest critique would be the movement - it's alot slower than in the original, and there were times where the other bikers would exit my range and it'd take a super long time to aim at them again. It also felt a little weird that turning would just have the biker slide to the side then actually turn.
The rest looks great though! it's a really well done duplicate :D