This game is weirdly addicting. I kept playing over and over because I had to beat my high score! (my personal best is 41 blocks). I think you have quite an interesting idea here that if you chose to expand upon would be really fun!
I also see you struggled with uploading textures and sound effects with your html file. One way you could do this is to put them in the same folder as the html, import them like you usually would, and then zip the entire folder and upload that to itch as a browser game (also, for itch to recognize it, the html file needs to be renamed to "index.html" before zipping). That way you can keep your own images and sounds in the game, and you won't need the file upload buttons anymore.
That said, I did have some fun putting in random things from my downloads folder as the block images!
But despite apparent technical issues, I still really enjoyed your game! its quite addicting and I keep wanting to come back for more! If you have time, I would appreciate if you came to check out our game too!