i have played the standalone version on my meta quest 2 and i have made a working cannon (one time use) it uses gunpowder then a rock as a projectial its on wheels so it can be transported easly and has two rods at the end where the rock is placed and then due to the explosion of the gunpowder when coliding with sparks or fire it BLAST'S the rock a pretty small distence but better than throwing small rocks
i used mass gunpowder to just send myself flying
also the standalone ver is pricy is what i think