The art and animations in this game are amazing. I think dash and slide should be combined, like someone else already said. Unfortunately I ran into a major bug where pressing W and shift while coming out of water crashes the game, and that seems to be a movement tech that's important to the game. Luckily none of the segments I played required it, but I had no idea what to do in the red gura room.
Great job though! Would love to see this fleshed out into a longer game.