We've added rotation and scale modes to the transform tool. You can switch between translate, rotate and scale mode by pressing 'R' when you have an object selected.
We have a lot more improvements for this tool planned, but these seemed like a pretty vital thing to add that give GMs a lot more options, for minimal development effort.
Other fixes:
Transform tool now clickable through other objects
Fixed server error message incorrectly showing when launching a game with only core packs