It looks fine to me, what did you attach the hinges with? just asking cause you have a lock on it. The size should be fine for a juvie/sub-adult Avic, at full grown I would go for a vertical 5gall would do, do you have a water dish or are you misting down the side?.
hot glue SUCKS when it comes to glass.yes i have water bowl and i attach it with a adhesive glue , the hot glue would not hold it
Probably he already has to.Yes that is plenty of ventilation , any more and you'll just be misting more.