The CRT TV look is really cool. The colors and distortion sell the retro vibe right away and the mushroom puck with all the flashes looks very striking.
The flashes are quite strong though, so an epilepsy warning or a softer accessibility mode would really help. I also ran into a problem in the web build. The game never went properly fullscreen and because of that the input started acting weird and I could barely control the paddle. In the end I could not really get into the rhythm of the breakout gameplay. If you add a reliable fullscreen toggle and make sure keyboard focus stays on the game it will feel much better.
The core idea is a classic brick breaker so I think after the jam you could push it further with some extra twists or powerups to make it stand out more.