Outstanding game, I love it when a game has simple mechanics, is smooth to play and you know by just watching the screen what to do. Achieving that is extremely hard , congratulations on your amazing job.
10/10 on the visuals, love the pixel art, love the drill animation and also the transition between levels, your art work is simply marvelous.
The sound design is also remarcable, fits extremely well within the game and the main game loop is pleasant to listen to.
I would also like to report what it looks like a bug, while playing, I failed one input and got what it looks like two next possilbe steps, but it only happened once.
Congratulations again, you have made a remarcable game indeed!