It took a few tries to figure out that holding the mouse button stops the wave and your score is not the blocks you avoid but the sine waves you complete.
I dunno, I'm not into memoryless skirmish mobile games at all, but
I associate sine waves with color frequencies, so maybe give the past wave a color.
Varying the width (bandwidth) could also give some variation.
Every 10 blocks avoided gives you a bomb. Otherwise it's for a target audience that always wants the same.