Haha. I like to think I know some cheats in getting things working fast but not great. For example, I cheated on selecting a tile, by using a raycast onto individual tiles in colliders, because figuring out the math to convert the cursor position would take too long.
It did bite me though as the final boss and several bugs snuck through by being just a bit too slow to on fixing bugs. (RIP 8 minutes too slow uploading a bugfix patch.)