This is looks really polished, i understand you ran out of time to do more but from what i played, it was really good. the bubble falling animation was so nice and made me feel good Lol. i did eventually complete the level and there was nothing more to shoot at, so maybe a tiny restart button mightve completed the loop abit more. (my score was 17k)
i did see you made a level editor (lol), so if you plan to develop this further and add a few sound effects im sure the result will be great, gg!