You can at least work around it, by using the option for either a specific item/sprite or a list of item/sprites to render transparent - or, all item/sprites with the word transparent in the name - and then simply leave out the names of all your sprites.
Borksy makes all items/sprites transparent by default. You can change this in the hack options. If editing the hack options is unfamiliar to you, or you need more help creating the exact solution you need, someone in the Bitsy discord help channel can probably walk you through it.
