Not sure if I'm allowed to post this since it involves a glitch (or if anyone really looks at this forum anymore), but if anyone has trouble reaching some of the red/white coins, one fun thing you can abuse is an spring-grab-jump. The timing and positioning is kinda tight, but right as you bounce off the spring, if you press the sword swing (I think it's Z in the default setup?), you'll grab the spring and bounce off it at the same time. If you high jump off the spring and grab it, if you drop the before you hit the apex of the jump, you can chain them until you hit the ceiling. Makes this game like 10x more fun with this, ngl.