Time stopping as a core mechanic is very neat! We enjoyed the sound effect of stopping time, but would have liked to see a visual effect as well - especially one that indicates time is currently stopped. Perhaps a color filter on the screen?
The various different types of art styles felt a bit clashing, a more cohesive look would've been nice - For example if you'd like to keep the 3D/2D combo giving the 3D models pixelated textures of a similar pixel resolution to the 2D artwork would work nicely.
The movement mechanics felt pretty nice, but the ability to dash an infinite number of times got a bit out of hand. Similarly being a bit more forgiving with the jumping would be neat - in some of the level design you can barely make the jump.
The ability to stop time and put a whole lot of knives in the air felt very nice, excellent use of time stopping - Good job!