What a cute and fun idea! I like the aesthetic and the premise for a tower defense game with candies and taming enemies to use against other enemies...you have a great basis for continuing the game further.
If you were to continue this, I would say that the fact that the girl can jump on enemies practically renders the candies useless. But it was just that one level, so that might be something to explore in future levels, with different abilities where the need to have additional helpers to kill the enemy slimes would be helpful. I look forward to seeing this one expanded; I think it has a lot of potential.