The game can definitely get quite challenging, even on the easier settings. On Lite Mode (with bigger bullets) you can rely more on reaction time, but on the other modes it’s more about learning the rhythm. You can choose to rotate in the same direction as enemies ie go clockwise to give yourself more time to shoot them. If they are too slow you can go the other way.
I’m hoping that balance adds some fairness and replayability. I also updated the game today so it now tells you how many degrees off your shot was from the centre of the nearest enemy — so if you’re only five degrees off, you will actually be very close! The voice will be different now as I'm still trying to stop it talking in Porteguise for some.