Please criticize this infinite glider game I made!

I made a game where you fly through an infinite cave while dodging the tunnel walls and other obstacles. Please provide any and all criticism you can, no matter how specific. I want to improve my skills in game design as much as possible.

Watch out for bats!

Looks nice - didn’t start the 1st time for me - had to press green flag but then fine after

I would suggest making going up a bit stronger and gravity also stronger as sometimes there is no way of avoiding the cave roofs/floor

Yep, that is what I wanted to suggest too.

Unfortunately it lags sometimes, it should line up pretty well with good performance. The game is just inherently laggy I think.