You can press space if you want to go underground, changing from build to break (1= Build 2= Break) means you can well, either build or break! If you see any glitches please leave a comment and I will be glad to fix them.
I have a Youtube channel called J Toons, so if you want to then please consider subscribing! You could also find my channel here: https://www.youtube.com/channel/UCAlxdPEkoKjDf-zCax0A_Aw
