Haha, honestly the only reason I kept watching.
Not trying to be harsh. You seem like you just need a better grip on the tools.
Shift: Move things up and down, works with virtually everything.
Ctrl: Well... experiment with this. Basically it allows you, once placing something with shift, to then be able to place consecutive pieces HORIZONTALLY at the elevation of that piece. It's a fairly complicated tool.
Thanks, I will remember this for future remakes.
MOD EDIT: Please use correct spelling and grammar- R.D., Games Forum Moderating Team