Very cool Idea. I really like the balance you have to strike between maintaining some spin and not extending the spike. Really cool.
My only feedback would be some indicator beyond the spin rate of the sprite to indicate how close you are to spike speed. Maybe a color change, maybe a speedometer somewhere, idk. But it would be useful for the player to have an idea of exactly how close they are to deploying the spikes.
I think you also did a great job designing the level for the mechanics.
I really hope you keep working on this one. It has potential.
Thanks!