Too easy and too pricey
There are other established games which offer much more for less money. The gems that you can collect across each level seem to be randomly attached to the cage, at locations where the imprisoned bird should have managed to collect them itself by now. Speaking of the bird: it seems rather at ease where it is, and when the cage is finally opened it theatrically just flies around it, whereas it would have been more believable if it flew straight away from it. And on the next level, it finds itself imprisoned again without apparent reason. It doesn’t quite make sense.