I liked the UI/UX, the SFX & the music, and I relished the player feedback! Somethings I admired: the first thing, at the start of the level, the game waits for you to press A or Space to start the stage, and that gives the ability to see how the level looks! The second one, when you die, you see on the UI why you died!
I suggest working on the controls like what Eduard has mentioned, and shortening the text on the "how to play", because nowadays nearly no one likes to read long text that's on a game