Please finish this! The style and the substance are both pretty tops. You probably already know about most bugs worth talking about here; my only critique is whether I did everything that could be done at present, since at least one visible lever was un-pulled.
I also liked that there was a jump early-on that makes you use the fullness of your vanilla-jump and understand it mechanically better.
Also, I don't know how well this fits with your design paradigm, but as a player if I could destroy the wall and ceiling shooters I would be ever so satisfied with that. Following; hoping for more from this project!