It's a very cool, well-polished game. The opening is a little slow (you maybe could have shown the player trying to collect berries for the dragon so there'd be a bit more interesting going on?) but it really opens up once you get the glide.
I think the animations could be improved - for instance, I think pressing down + attack is supposed to be kind of like a Zelda 2/Ducktales/Shovel Knight pogo move, but it uses the same animation as regular attack? So i couldn't tell whether I'd done it right until I hit the spikes.
The random freezes were also annoying, but I understand there's not much you could have done about them.