Hi Dustin- yes, falling through the world does happen occasionally, due to the way the level generation works it's possible that rooms may spawn in overlapping. We hope to have this refined in the final game. As for the way aiming/interacting works with the camera position, this should also work better in the future, as we plan on implementing a "zoom" feature when right-clicking.
An update planned for this weekend should hopefully fix the controls and make them feel tighter and less slippery.