I played this after I saw it kinda butchered in a stream, this is SO GOOD! I would never probably shut up about this if I made it in only 4 days! I hope you keep working in your free time (I saw you have a main project to be published soon) because I think there's great potential!
The only thing I'm not a fan of is the slowing down at the end of the timer, I think it's a cool effect (I think the point was making more impacting and precise the last seconds before swapping?) but it gets annoying quite quickly, at a certain point I started resetting soon only to avoid dealing with it.
Great work with visuals and audio too! Everything is really really polished! Also fantastic take on the theme!