The momentum of the dive is janky -- if you hold down a direction key, the swallow careens into the side of the screen, suddenly accelerating in the direction pressed very quickly.
The viewport is really small; if you had any post-process upscaling for it, it didn't work.
The death sound got rather grating very quickly, since it is rather difficult to not hit every obstacle on the way down.
It is, however, a functioning game, which is more than I managed to make.