Really great art and animations! I love how the menu screen opens in the center to reveal the credits, almost like pulling back the curtains. I like the concept and I think this would make a fantastic mobile game. I could imagine this being multiple levels like seen in Candy Crush.
I would have liked a more strategic power up phase with the cauldron that counts down with a timer and then the battle is shown. I think that the battle scene is almost completely overlooked because the two scenes are playing at the same time unless you spam space quickly.
There were a couple occasions where I pressed space and skipped information about a new combination. I think a different key for dropping the items and skipping the dialogue would help, and maybe even the option to click on the orbs in the battle scene to read about them again.
Overall, I really enjoyed playing your game! The SFX and music are fun, the UI is great, and the orbs are satisfyingly smooth when they fall and collide. Great job!