Well I've got myself a new addiction... I made an addressable 4-bit register, first time I clicked Create it didn't work so I rebuilt it and it worked somehow. Amazing software :)
Suggestion (that I haven't yet seen): allowing to increase the height of the chip bar, instead of having to scroll
A 7-segment would also be lovely, but I understand that'd require quite the rewrite especially if inside circuits :p
EDIT: I managed to build a 6 bit x 6 bit multiplier, with 12-bit output, made with no less than 11 4-bit binary adders and a mess of wires :D