Nice integration of platforming with word puzzles. It took far longer to get to the end than I was expecting to spend playing a game jam game! Good job introducing new mechanics and gradually explaining them to the player.
There was 1 part of level 2 where I got a bit stuck - In the room with a fan on the floor and 2 diagonal beams to climb up, the jump to the top platform seemed impossible until I realised you can use sprint in mid air (I think it was made harder by a bit of a problem with your grounded check where it thinks you are not grounded if you are walking downhill so it prevents jumping sometimes)
Mouse camera movement would have been good instead of arrow keys - mouse look is implemented as standard in the Unity Third Person Controller, so it probably would have been less work!