Had some trouble running the game to run on firefox, kept saying "Could not compile vertex shader." So I played on Chrome.
Really cool game concept, visuals, music. I really liked how you introduced rotation, that was super unique and creates a lot more potential moves for the player.
Would be interesting if you made it so walking into a wall with oily caused him to split apart, and you can switch between multiple parts. Would add even more potential level designs.
I agree that oily feels a bit too slow, along with some of the scene transitions. Made level 4 a bit frustrating, though that would mostly be solved with an undo button.