Thank you for clearing that up. My bad for not reading the description carefully!
I was now able to play through it! But there is this bug when you do the dive and collide with a ceiling, you get infinite upwards momentum. You can basically skip the middle section, where there is this long bridge above you when you dive against the ceiling.
Anyhow i liked the game much more with the dive key and respawn time didnt seem so long anymore :)