I like you colorful candy-like art style! The music, soundFX and voice acting blends perfectly well with this style. The individual colors and backgrounds for each character is also a great idea. The UI is easy to grasp and does a good job as well.
The only improvmeent that comes to my mind: The mouse cursor is feeling too sluggish. It lags significantly and follows my movements too slowly. If your game engine offers a OS-system based custom cursor option, I would suggest picking this one instead. The tradeoff might be a smaller picture, so I am not sure how important you think the big cursor size is for your game and audience.