A tough game, but a really cool concept !

Took me some time to get into the rhythm of things, but after that it was a bit simpler (but still challenging). Though the blue ball has a tendency to get locked in place for whatever reason...

Good concept, good art, cool music and a great game, good job !

The concept is full-on 5 stars. An Arkanoid rhythm-based combat game? That's awesome!

My WebGL is buggy so I couldn't play it to its full potential, but I think some more feedback would help the player figure out what to do.

wow that was a bit confusing at first, but nice concept !

Hey Ball-game Brother(s)! Great concept! Love the artwork and music. Reminded me somewhat of Donkey Konga for the GameCube. Cool stuff!

its look so cool. u can control the ball but u cannot spam. the idea is cool 8/10

Super duper cool game! Similar to a couple of other people, I was a bit confused on what was happening during level 0, but after I got the hang of it I had loads of fun. Great job!

this was so cool :D at the level 0 i was confused about what was happening but them i realized and it was so fun, great concept and great execution, also the music fit pretty well, the keys changing from phase to phase was also a nice touch

I am really digging your game concept! It was very fun to play and it is a nice game mechanic. It is also pretty cool that you have got different levels. I think an intro (level) would have helped, because the controls were a bit hard to understand at first, but you get used to it. One thing that I noticed was that you could get soft stuck if you and the opponent both have only one direction key left and the ball keeps moving along the same axis. 

Overall one of the most enjoyable games that I have tested so far, good job! 

Cool game! I like how you can lose your keys if it gets hit by the other nano ball, which means you have less control of your nano ball, its a cool concept. I think it would be  better if there was a little tutorial to guide the player. Took a bit for me to understand it.