I just started watching your channel, (just finished the Developing series) and I think this has some good "aha!" moments, the character feels really great to control. It would really do well with some sound. I do agree with MasterAir, throwing the magnet into the pipes to open doors is a bit awkward. I think the levels are pretty well ordered (I'm not great at puzzle games so I don't really know), although I did skip the second level to go to the third, and then came back and completed it.
