Nice and simple game mechanic, would not look out of place in an arcade game. Though I'm not sure how music and rhythm plays int this though.
P.S ,thanks for playing my game, I have uploaded a new build for my game minus the bugs and plus some new collectibles, pleas check it out.

What a cool game, truly unique

This is going to take a little more rotations around the clock for me to wrap my head around it.

Took me some time to understand, but then the music made so much sense ! Makes you want to perfect it more every time. Really smart idea and great game ! Made me think a lot on minimalism and I think it's a good example
Good work !

Very creative!  Getting the hang of rotating the circle correctly took a bit of practice but I made it to what was probably near the end of level 2 after ~10 minutes.  I almost thought it was over after the "congratulations" sound clip and the end of level 1, but I'm glad I continued because the 2nd rhythm was fun!

I found the background music to be a bit awkward--there's nothing playing on the title screen, and then there's (very nice!) music during the tutorial screens, which then cuts off upon starting the game.  I see how the polyrhythms probably don't play nicely with most music, which might be the reason for nothing in the background while playing, but maybe something like an arhythmic drone track would work to fill out the sound space here.  There's not a lot of sound feedback in the first moments of the game before any rhythms are playing (and I didn't understand that that's what was going to happen for a while on my first attempt while I was very bad at the game XD), so I wasn't sure if something was broken or not.

An interesting behavior that evolved out of the game mechanics was that after barely missing a colored target section a few times (which happened a lot to me early on), I ended up with death zones surrounding all of my targets, which made learning a bit unforgiving.  But the panic of going for a target with no buffer on either side was also kind of exciting, so I don't think this is necessarily a bad thing depending on how you want the game to feel.

One feature I was wishing for while playing longer games was some added safety from finishing a ring quickly.  If the buffer circles that weren't used in a previous ring could fall back towards the center, this would reward efficient targeting in the first rings, and less opportunity for a sudden death deeper into a run.

All in all, a very interesting and fun game!  I enjoyed playing and the resulting rhythms were fun to hear unfold over several rings of targets.  Great work!

aRHYTHMetic has a really nice progression between levels.Congrats, my friend! It’s quite a challenge to build the music. I failed a few times :D

I made it to the piano, and I’ll definitely try a few more times.

Regarding the island rotation, it could be interesting to have a system to accelerate or stop the rotation. That might make the movement feel more dynamic. Just an idea for a future update!

Thanks for making a web version too (I'm on a Mac right now and trying to set up a virtual machine to run .exe files).
And thank you for your feedback as well!

Super unique! Slowly building up the sound track is very satisfying! Estimating the exact path Jhonny takes is a but tough cause the circles are small, but I love how much riskier it becomes when I miss the glowing circle by a hair and suddenly there is less room for mistakes. Excellent game design!

Oh wow, at first i didn't understand why there is no music, and i thought that this was all game, to keep this man alive. But I accidently collected 3 yellow points, and understand that music is like layering with different colors you hit, that is pretty cool mechanic i must say!

Great game! I’ve already beaten it twice, love how the character follows random trajectories! And no double tapping. Well designed. Seriously well done! 😁😊