Hi SaCoderz!
Sounds like we have some similar background in education and programming.
I tried your game and it has potential.
I would like to suggest using an effect for your bubble pops that looks like a bubble popping instead of just destroying the bubble.
You might also choose a clipart cartoon tub instead of the old fashioned claw foot tub and you could add an animated character in the tub and the bubbles coming out of the tub instead of from the floor.
This is what I suggest:
https://openclipart.org/detail/235805/woman-talking-on-the-phone-in-a-bubble-bath
There is lots you could do with it to make it more entertaining but you have a good start.
Maybe instead of just click on on the bubble a character in the tub could have a slingshot you aim at the bubbles?
Instead of a static score you can have the bubbles pop and throw out a score for each bubble like a health level and make different sizes and colors of bubbles for variety and to increase the challenge.
Just some ideas!