Very interesting concept! When I first read the description I thought it would be like a typing game where I just need to press the key to attack, not press a key to move a character to then attack. I felt disconnected with the character at first because I'd keep thinking wasd to move but it was literally any key to move. The voice and overall sound design really adds to the polish of this game and it was a lot of fun. I imagine the coins being used for something else in later builds.
If you wanted to add different difficulty to the game consider using the number rows or more special characters! I think that'll make for some fun variations and move spaces.
Enjoyed the game in general it was refreshing to play.