Fun game! Controls feel really nice to handle and I like the time mechanic you implemented. I also like the addition of the crowns, which provide the player an extra platforming challenge. Your checkpoints are generous, which I appreciate, and the visuals and sound design is really good.
I think the falling platforms and spikes should move slower. Certain areas feel luck-based when I try to stop time because the objects are moving so fast that it's extremely difficult to react to. I think the platforms should move at a speed that's fast enough so that the player has to use the time mechanic, but slow enough so that they also have time to react and strategize a path. I also think a bar that shows how much time can be rewound would be useful. Sometimes it rewinds a different amount, like when you're using it repeatedly, so a visual indicator would be nice.
Great game overall. I enjoyed playing through it.