An interesting idea with really nice graphics, but it doesn't have much in the way of longevity. I feel like there could've been more of a sense of increasing difficulty or something, but it starts to feel samey past the first few levels. The digging up and down mechanic is also kind of weirdly implemented. There could've been a spawning particle or something to indicate which way you were digging, so there didn't even need to be new animations.