Absolutely fantastic! I'm not sure if you intended for the switch mechanic to function the way it did, but it's incredibly fun. Not sure, but if you've played portal, your combination of mechanics reflects the effect of having an items fall perpetually through the portal. I've managed to cheese a few levels and even fly off the screen at one point haha.
Love the little game you made, it is one of the few games which deserve a 5* for fun. Well done!