how to use the construction mode? I can't select an item
you press B, then press tab and a side menu will pop up, then you select "Take out the item" option, select the item, move around to position, press R to rotate, Z or E to place, once placed you can select the item again to grab, put back in inventory or elevate/lower.
in the newer version you now have wall and floor editing separated with more B presses.
Also if you want to cheat the games money or stats, you can simply with Cheat engine, all values should be in 4 bytes