I didn't see a way to make mouse controls work in 3D so the controls are:
press x/y/z to move on transform on that axis. use up or right to increase the value and down or left to decrease the value
press r/t/s to switch to rotate/translate/scale mode.
Press a to add an object, you can add as many as you want, but be warned my laptop got quite slow if I just left a window open with around 8-10 objects in it. Also the more objects you have in the scene the faster the transformations seem to be. NOTE: when you add more than 3 objects rotation does seem to become 'un-uniform'.
I would recomend testing on the y axis as it seems to be the easiest to visualize. It goes almost straight up in the positive direction, while the positive x axis goes diagonaly down and right and the positive z axis goes diagonally down and left