wait, jsut for the record:
the feather is in the machine area, you enter the machine area from the left. and going one screen up, you see the feather but cant get it since this seems to be the exit of it.
the candle thing however is bsically in the castle (the "observatory"),
down down, to where there are water pits . and in the left room, with water at the bottom again, the candle is high up, with no way to climb up there from where youa re standing.
is there secret passage or something?
and that skeleton, is that in the room above the candle room, do you jsut need to stand there at some spot?
also still trying to figure out how the "constellations will show me the way", the moon room is sus as f, but no standing around there has done anything.
so far, I have already played it twice, will do it a third time.
mainly, if you want to miss one point thing, you have to first get green key from left and everything after is in the castle on the right.
activate mechanism at top of castle.
not much to do to get back where i was
okay I finally beat the game, only missing a point thing in the pruple dimension (the place where the egg is, the point thing is behind solid walls in the bottom left of that certain room, with tentacles and shooters in there too).
the skeleton thing was a road block no doubt. still had some short breaks after where I had to go a bit back and forth to rmeember where the enxt step shpould be. but was doable.
obviously platforming sections were harsh but doable after a couple of tries.