Very impressive game! Love the classic graphics, and the old-school TV filter is super nostalgic. The music is rocking. The puzzles are clever. (I didn't finish, but I did get to Level 6.)
I will say that after a few minutes, the novelty of "typing" the move commands gets a bit old. I wanted to focus on the puzzles themselves, and the typing element was more of a distraction, especially since I was only ever typing U, D, L, or R. (Typing can be fun, but mainly when you are typing unexpected and novel words.)