This is great! A few small quality of life points:
1) Can you allow a key press to trigger your ability? I'm playing with a mac trackpad where right clicks are two finger taps that often results in me launching more balls instead of triggering the ability.
2) Could the yellow paddle's ability be a different shade of yellow with your paddle layered in front of it? At the moment, it's hard to judge where your paddle is when the ability is active.
3) Could the yellow ability give some indication of when it's going to disappear? I wasn't sure whether it was timed or tied to x number of bounces. This goes for the other abilities too, but it's most annoying with yellow and green.
4) The ability indicators could be more readable. I'd argue that they're more important to be within eyeballing range than the HP and could benefit from appearing closer to the play area (and perhaps being more visually distinct from the HP squares)