Nice! I like the glow effects, UI is pretty clean. Pretty cool that you've got target times for each level. Really liked how the star and circle shapes played. The shatter effect when you break through the blue walls was cool too.
You should apply a zero friction Physics2D material to your player so that you don't stick to the walls on the standard platformer shape. At least for me it got a bit irritating, particularly since there's an emphasis on finishing quickly.
Level 3 was pretty hard relative to the other levels, definitely took me the longest to do. I think the circle shape has the biggest learning curve since you have to aim way above your target, generally speaking.