Love this concept! Visually entertaining and refreshing gameplay!
The "HELP" could have been a bit more refined explaining what are the "enemies" we are attacking. Additional feedback when breaking or attacking the enemies would be nice. In -game, "Back to Menu" appears to break the game as no enemies will spawn in. However, closing and opening the game again will fix it.
Really hope you continue with this or at least publish a fleshed out/polished build in the future. Had lots of fun!