Far far far too easy . . . I died once at level 21 because i was too busy wondering if the shaking dude that came out of the top of the screen was a bug to click it. I don't think i took damage from level 1 - 20 at all.
Needs some work on the physics with the bottom bumpers in most of the levels . . . not every deflection should shoot straight up. Other than that a good game overall 4/5.
I'm playing on hard and epic just like it says, but I still have to say theres no skill involved. Press assault > use meteor skill on revenge wave > win. Every level so far.