Heh yea, thought about deselecting - there was an original bug that let you select the same orb 3 times and generate an NaN / infinite-size triangle to clear the board. And thus deselecting got axed :)
Wanted to have a couple of bomb-orbs to help clear out the neutral ones, but you can remove them safely by making bigger triangles that encompass them too. Definitely stages that act as timer and orb resets are in the cards if (when!) I continue this one :)