This is amazing for your first game! First time through I was really surprised by how good the art is! The sounds are really satisfying as well. And just a suggestion, but I would love to see a stronger puzzle feel to this game. I think you should do so by emphasizing the importance of hole-drilling, make the player really think "What is the best place to drill a hole in this situation?" and make that thought process the focus of the gameplay. Nevertheless, amazing first game!