This was a fun game, but pretty short and not a ton going on. Despite that, I still enjoyed my time with it and you can definitely expand on this concept.
I think you can improve the smoothness of going from level to level by adding one very simple thing: allowing the player to hit enter when the level is over to go to the next stage. This makes it so that the player doesn’t have to lift their hands away from the homerow and to the mouse. I think thats a very small but important thing in a typing game. The more keyboard oriented you make it, the more satisfying it is to play and the longer the player can stay in a flowstate.
Good work!