First off, Good Job very cool vibes coming from the game, as soon as it opened up I saw a sweet intro graphic, and was like woah okay. I really like the addition of the bubble custom cursor.
The music sounded great music and was quite catchy (even on loop), loved the little riff.
The window size for the game itself was really big, with no option but to full screen, maybe next time you can build 1280 x 720 with the option for people to fullscreen, better for small and larger screens.
The game was pretty chill though i noticed that you had the bubble moved towards the mouse, so early game it was fine to use the mouse but later game there was a significant advantage to use the keyboard since it was instant movement. Around Level 8 was where the difficulty spiked quite high but then fell back down. I did notice around level 9 I was firing so many bubbles i had lost track of my player and because I was moving so fast from the buffs and I was dealing so many extra bubbles I lost track of my player and found I had to swap back to mouse just to keep track of my position.
Overall very good Game, needs some tweaks but enjoyable :