Cool game and cool character! Good use of textures and sound effects.
There are some issues in how the level is designed, as the player activates things outside their field of view and portals may teleport them in range of enemies' melee attacks. The mechanic of the camera tilt that you only used once could be re-used, for example, to show the player the locked door before they even have the ability open it.
Also, before closing a door automatically check that the character is not in the way or they may get stuck in the door.