Nice game! You should mark this as being able to be run on mobile. I tried it on my phone and it worked okay. I only ran two levels at the moment because I'm getting ready to go home. I will try to play some more later.
After playing on the computer, I see that there are numbers to press on the keyboard. To make it mobile friendly, you can add code that says if the OS is Android or Apple(I forget the exact code) to enable some buttons on the left or right that allow you to activate the skills of each ball. (Just a suggestion)