Some hints:
Sphere puzzle:
Boulder puzzle:What happens when a sphere coloured one way hits a sphere coloured another way?
Electric puzzle: (yes, I shamelessly stole this puzzle from one last hurrah)The two character trick is used here AGAIN.![]()
After both rows flash together, wait for the bottom one to flash, as soon as it will stop flashing, go on the bottom row, then wait for the top row to stop flashing, and immediately cross to the rainbow coins.