Hey sorry my comment won't be too long, as the time is coutning down as I write.
Cool idea, crisp controls of the bug, not so crisp of the robot, but this isn't a bad thing, but a part of the core experience. I think (what others already pointed out) better explanation of how to make the robot jump would go a long way. The game also seems to be pretty hard (at least it was very hard for me). Lovely artstyle and cool sfx.
I am pretty sure that this was just your design decission and I am not going to say if it is bad or good, but I feel like letting the player do a partial move (not fill the whole bar) could lead to an easier game, but again, maybe that is not your intention which is fully fine.
cheers