It would be nice if three hits on a bird killed it, or something like that. That way you can get through those levels faster if you're willing to aim at the birds.
I can't stand when a game ends with a ton of cash. If we're going to earn that much, provide more weapons to buy or the ability to pay for base improvements.
this is not a game. it's holding the right cursor and jumping incessantly. pointless. i can listen to music of my choosing while playing an actual game.