I finally got 100%, wow those items were hidden very well. This game taught me to jump into every hole because you never know you might find a secret.
Love this game, though it was a bit annoying when trying to go through the higher movable blocks since for some reason when jumping/flying you can't move left or right at the same time. Also sometimes I get stuck in the tight areas, but I think if the game was too smooth it wouldn't have been as fun or challenging.
Also I found a glitch, I pushed the middle movable block on the left side of the screen that you spawn when you start/restart the game and instead of going to the secret room it put me back in the first room as if I had died or something. But since then it has never happened again, so maybe it was a one time thing.
Music was annoying after a while but thank goodness for the mute button. Which most games do not have. I am kind of glad there isn't an autosave because I start this game again, but I have a feeling that if I accidentally click closed window or refresh then I'm going to regret saying that.