Pretty fun - feels like a mini game from Mario party.
Art
The individual assets look good, but the background objects and the rocks are a very different style from the player sprite, potion, and coin; which are also different from the menu buttons.
Still, each asset has good visual clarity, and they look nice.
Sound
Functional. Each rock impact has a very sensible noise. Some background music would go a long way here.
Gameplay
Fun for a limited duration. I wasn't able to figure out what the coins and potions were for - could be a skill issue on my part.
The big rocks are a clever way to modify the play area and ramp up the difficulty without just sending more rocks. Expanding on this concept would increase replayability significantly.