Although the game is fun it still glitches. For instance, if I were to die while going to the right without bringing my thumb off my phone, the ball in my next life would automatically move in that direction without me even touching the screen, but this only happens if there's a full-screen ad that pops up between the two lives.
Also, the music and sfx will occasionally turn off (I haven't experienced that happening simultaneously though). One way to turn the music back on is to go to the main menu to mute and unmute the music (but I haven't been able to see if that works if the sfx turn off). And here's a way to turn ANY of the sound back on if it randomly mutes: just force quit the app and reopen it—it's as simple as that.
Other than that, it seems to be flawless. Keep up the good work.
Also, just in case this helps: I'm running iOS 9.3 on an iPhone 6s.