Yo I always like seeing more mascot platformers since they went away for a long time. One big thing I always look for in a platformer is if it feels good to jump, big reason I didn't like Yooka-Laylee. Your ground pound looks and sounds good, but I feel your jump could be better. Mario has a very particular arm raised leg raised animation to sell his jump after he's in the air, but you probably don't want to change the animation on the jump at this point. If you added a larger puff of smoke and trailing smoke trail from the initial jump point it might be easier to implement to sell the jump more, this is what A Hat In Time does and it works despite the jump not being that high vertically.
If you end up changing the animation, Skylar and Plux has another really good jump that is mostly sold by the character's body changing shape from pure vertical during the jump to floating outward limbs at the peak.
I look forward to your eventual full release!