Great submission! Can tell a lot of thought has gone into the puzzle/levels, I enjoyed my first play through. Good idea having the additional goals, it'll hopefully encourage multiple plays. Took me to level 5 to realise I could jump on the orb! That should make some of the earlier level's coins possible. :)
The only troubles I had were with controls, and some of the colours (I'm a mildly red/green colour blind). Using both WASD and arrows gave my brain a good work out -- perhaps this is intended -- but for the most part I was only ever controlling one character at a time. I would appreciate an option to allow switching who I control.
Other than that, some QoL thinks like "R" to restart, and enter/space to get through the end of level screen would be appreciated. :) Overall I really enjoyed playing this one. Music is super chill and very appropriate!