Thanks for playing the game, I'm glad you enjoyed it!
I'm curious about the issue you had when launching the cubes. I'm not really sure what you mean exactly. Could you elaborate on it, please? I would love to fix the issue :)
This is probably some intended behaviour but whenever I hover above the green line I can't launch a cube. It's not that big of a deal honestly but when aiming it can be a bit jarring so to say. (few friends of mine had the same at first before they got used to the controls)