This was great, very creative (a little stressful though). I managed to get stuck under one of the bridges in the later levels - there should probably be some kind of "suicide" button (like with lemmings) when that happens. Lots of potential also for more triggers and more mechanics. Fun! I felt the controls were a little awkward (needed a lot of precision to target the objects - maybe have a highlight over the object that is being targeted?), but perfectly serviceable. Nicely done!