Final Boss Fail. That dragon is way too hard.
I've made it as far as Day 16 and upgraded myself to the point I'm God and even then, that dragon slays me. Having absolutely no way to kill the dragon without the Divine Edge AND no way of knowing when he's gonna show up from Day 8 onwards makes victory more a matter of dumb luck than skill.
At this point in the game, your odds of victory no different than playing the Roullette Wheel in Vegas. No amount of preparation is gonna tell you where the ball is gonna land once the wheel stops anymore than it's gonna tell you when the dragon is gonna show up and when you're gonna need that D-Edge.
Like I said, it's all a matter of blind, dumb, clueless luck.
Add some more songs. Perhaps you can change the songs when the player accomplishes a certain amount of achievements or you can offer a list to choose from. I like the music, but it gets kind of tiresome after the 1000th repetition. Fortunately, it's a very relaxing song, but it would be nice to have more variety.
I like this game. It takes a great deal of strategy in regards to your upgrades. But I'll have to agree with some of the haters. Once you know what birds to purchase and the right sequence to upgrade them, it's easy. I skipped 2 level 18 and beat it. Easy once you figure it all out.
I'll admit, the physics are frustrating, but that's the whole point of the game. You have learn how to use them to your advantage. It's challenging, but that's the whole point of the game. I hate games that are too easy.