I was stuck for quite a while at a spot I needed to throw and object into a teleporter. It seems that throwing in the window did not have the same end result as throwing by the hand icon.

I know this seems obvious now but the object WAS going into the teleporter via the first method but timing was making it appear somewhere else ( I assume it was timing)

This may save you some heartache... the only time a puzzle has stumped me (so far) for ages and it was (partly but logically) an interface issue.

Actually, it was going the right way, but when you throw objects by picking them with mouse and "dropping" them at the top of the screen, they only fly 3 squares/tiles. You needed to deliver it 5 squares/tiles total, so you needed to use "attack".

Thanks
yeah i figured that out eventually... makes sense...but not really made clear by the interface