Fun game! It took me a bit to realize just how much you can burn with fire (felt stuck until i finally got fire/flower), but after that things were mostly smooth sailing. It was pretty cool being surprised by what Size does (i first used it on fire/flip/size), too.
It seems super surprising that G flip flower is even close to possible; I'll have to ponder that one for a while, I'm sure.
Also I got to the bottom trophy room note with G key, which is clearly the best combination to reach it with.