This was a fun little puzzle game!
It did take me second to figure out the controls though (I used keyboard)
And with how easily you can softlock yourself I'd have liked it if R was bound to restart
And isn't it a bit brutal to softlock the player on the introduction of a new mechanic? how was I supposed to know that small morpho can't push blocks, has a very small jump and can't turn back into regular morpho, the can't push blocks thing makes some sense, but the small jump and can't turn back things are more unituitive, since in most other games I've played the smaller character keeps a jump as high as normal, and I thought that the Plusses worked like a Toggle instead of a one time thing
And the fact that big morpho can't push blocks is unituitive, because bigger == stronger in my experience
I still had a pretty good time with this, it has good sounds, is pretty, has interesting puzzles and from what I could see it's bug-less, good job making this in 4 days!