This game is clever in its design with the idea of having only limited visibility to see and deal with the obstacles, but I believe that a little more polish is needed in order to really perfect the game's execution.
The primary thing that should be updated is the player's hitbox. I think it's perfectly fine to have tight, confined spaces like the room on the left with the spikes; it adds to the challenge as necessary. However, the experience feels a little cheated when the player gets a game over, even though the character model didn't truly collide with the spikes.
Other than that, the game is short and effective.