Personal taste - the map felt a little too open and I sometimes felt I didn't know where to go (Didn't know where to go really after getting the Shift power in particular)
I have no idea what the red wedges did - I assume health or time or something?
Using the clone/Shift felt like I had to be ready to do all my inputs at once. When the clone was offscreen that felt particularly hard to use - maybe a teleport animation to give the player a moment might help.
Shift/Clone was a great way to get around the problem of 'everyone does double jump' that metroidvanias run into
Hitting enemies felt a bit underwhelming
all in all a solid entry!