Hi! Thank you for playing and for the detailled returns!
You can win by collecting 20 boxes (glider pieces) and holding down the E key for three seconds (there is no visual indicator that it is loading, but it works I promise). It builds a glider that would eventually carry you peacefully to the bottom. Most people do find the level of difficulty to be a bit high and I agree. I tried to balance that in the last hour or so but it is quite difficult! I hope you'll give it a try to see the end screen!