This is an incredible game! The mechanic of getting 'dizzy' if you spin too much was a very smart idea. I absolutely loved the game and the sheer amount of power-ups available. The shop feels a bit unbalanced right now, but honestly, that didn't ruin my experience at all.
If I could offer one piece of constructive feedback, it would be adding some screen and audio effects when the character gets dizzy. It's cool that the movement slows down and the controls get inverted, but seeing some extra feedback, like music distortion and a wave effect on the screen, would make it perfect.
Overall, I loved it. Congratulations on the great work!