It's a nice attempt. I like the visual style of the menu. The difficulty curve feels really off though and the lack of a lose condition makes it hard. It feels like the animation for the cubes doesn't foreshadow the new line as well as other games of this nature (Osu).
Perhaps having a dynamic slicing animation, better foreshadowing of the cubes, a UI element for your current 'life' and different sound effects for slicing would make it better. Still it's nice and novel. The aesthetic is definitely on the right track and I think with some more polish this game can be a lot of fun. I can imagine just slicing rows of cubes back and forth, alternating my key press