This reminds me of an old game I used to like, I think called Puzznic. This one has an new mechanic with the grapple hook though. Once I got used to it, it made a lot of sense to me.
I did notice that if you moved too fast you could get stuck in a rotation which didn't allow the level to be solved? It might have been a combination of grapple then moving which did it.
Like you say it's in early development, and I hope you continue it! :) Well done.