Good gameplay. The graphics, although made up of simple shapes look really great thanks to the effects. I like the music you made. Also I have a suggestion. I don't know if it was intentional, but the main menu doesn't scale with screen size. I use 1920x1080 screen and the UI was really small. You are using Unity, so there's an easy fix for that: just selects canvas gameobject set it to scale with screen size(by default it's set on constant pixel size) and match width or height to 0.5, then it should scale well to any aspect ratio. But other than that, you did a great job!