2. Bonus orbs can be popped by clicking or right clicking. This makes Mindbender Level 7 much easier to score points in, since you can click on the bonus orbs instead of waiting for the laser to get to them, and it removes blockades for moving objects.
3. Fuses can be clicked or right clicked (both just toggle the fuse) even while they're not disabled, so hitting one with a laser would just be a waste of time.
These all look intentional, but the game never implies that you should be able use the objects like this. In case this wasn't clear, everything here also applies to manually moving the cursor and "clicking" using ctrl and the arrow keys.