I reached wave 7.
The best part of this game is actually the bat animation, I love it. The shadows passing over the clouds are cool too and the game looks pretty good overall. It sounds good too.
Like mentioned by the person before me I don't think the area much bigger than the screen worked that well here, I don't think it's common in games where your ship is always directed towards the top of the screen. as a result the game lacks dynamism a bit but I think it could be punchy enough with the exact same waves if everything happened on a single screen.
It was still a fun playthrough, thanks for sharing.