Nice lil game. What I would suggest is making the sounds a bit easier on the ears, so that just standing still and listening to the beat would be fun. Games whose music is made by their elements can be really interesting when they're done right. Finally, if you think you're not that good at art, go minimalist. Don't spend your time drawing bad textures, but just use some nicely fitting colors (coolors.co) and use clean, smooth text, not pixelated. And make sure that no text overlaps each other.