First I want to note that this concept is re-treading the exact game play of at least a dozen old flash games. There is nothing original about this game at all.
But, and this is a big but: yours is the first game I've encountered in the show case, to have been scoped for the production budget available. It is not pretty nor original, but it is complete. It is a full experience with almost no extraneous bloat* and leaving lots of obvious room for growth.
It is also well suited for the circumstances of this years showcase! Very few teams thought of the obvious solution to an online-showcase: make a browser based game. It's by far the easiest way to reduce friction and engage players quickly. Your start-menu introducing the basic game interactions is a nice extension of that. Well done there.
Your soundtrack and the constant buzzing sound effect makes me want to stab nails in my ears. It is entirely antithetical to your design goal of a "chill experience". Replace the audio and give us some volume controls, please.
* regarding "almost no bloat": I'm uncertain about the repeated power-ups (eg. three of each type). I didn't play long enough to check how or if different price levels differentiated in any meaningful way. Also: the description texts in the store are far too small to be read on a TV.