This is really good. You should be proud. I like your use of the camera, and I think you edit well.
You asked for critiques, so here you go -- although, this isn't so much a critique of your current film, so much as it is my two cents on where you should go next.
This film is terrific, but it is basically a montage. Almost. You've got a whole bunch of close-ups, some of them are shown in continuous action, and some of them in true montage form. But even the ones that are shown in continuous action almost function like a montage, because we aren't given the greater context of what's going on around it -- we only see an ultra-close-up of a pencil for example.
I think your next great challenge should be to vary the footage. Make a short film that shows continuous action for at least a minute, taken from many different angles. Observe the 180-degree rule, the 30-degree rule, and work on getting coverage in a scene. Based on what you've shown us so far, I think you'll do very well with whatever you choose, and I think you should choose not to limit yourself to close-ups.