I find it kind of weird that you can spin and jump out of ring spark field to cancel it. Dunno if it's intentional.
It's intentional, as I imagine Metal breaking out of the Field to use any of these ways to cancel it - it requires more energy than the Ring Spark Field lets him use. Then again, Metal never actually jumps or uses the Spin Dash in CD, so...
As for the technical reason, the state only changes ONCE when pressing C1 to initiate the Ring Spark Field. And as we all know, jumping, spinning, charging a Spin Dash, skidding and landing all change states.
Suggestions for the visuals could be
1. Making the sprite stay on metal's xyz position, instead of drawing a new sprite onto him every frame or whatever it's doing right now.
I made it look like the Invincibility sparkles, since just sticking with CD's design is boring.
2. Adding sprites to make it animated.
It is already animated. In CD the sprite just flips itself to get the other frame.
(Fun bonus fact: the sparks are rotationally symmetrical in CD.)
Also when starting the move, Metal should go into his RSF sprite, not his Spin sprite, since... he can take damage, cant go under spin gaps, cant break walls, and of course theres no spin physics.
The spin sprites are also intentional - it's a sort of start delay for the move, like the Super transform animation. Especially since in Mania the character spins for a bit before transforming.
