Clicking doesn't give you enough air which results in mass spamming of the click button to get up high enough, i was lucky to go through the first obstacle and the reason i was lucky because the background goes on top of the obstacle making it impossible to see where to go.  

I found myself spamming a lot which I don't mind but it only lasted a few seconds since the background covered over the hazards and the background couldn't scale to my monitor. 

Hitboxes are big and it's difficult to get around the obstacles because they are so close together,

The background does not scale properly for a windows Game

Going up feels very slow and in some cases you need to spam click to get over obstacles