Very fun! It obviously needs some balancing and sounds but, like you said in the description, it's just a prototype so I can understand the lack of it. I'd love to play it again in the future if you decide to continue working on it!
Thanks for playing! If I see more people like the game maybe I'll do a full version on the future; I already have some ideas, like introducing items which will make you change the way you use the code blocks, and obviously more code block types