Well, you made something playable. Not fun. Not very interesting.
To reiterate:
Needs visual changes (change the title screen,change the background color)
Needs audio changes (music too loud, lower the volume or include a volume adjustment system, can benefit from death noises)
Needs originality (this just looks like a bootleg geometry dash, make it unique. Characterize the square, add customizable backgrounds/music/maps. Maybe even give him a plot.)