Ok thanks for the advice, I will try it ! ;)

But how you do that, I tried but no results. Did you jump when you fall or you just let yourself fall ?

I didn't knew that and I don't know if someone had discover this skip, it's a shame that we can't use it because we would have probably save times

Is that someone could help me for this speedrun, because I put the game in 1.1.3 but the game crash systematically when the title sreen appears. I have checked and the game crash from version 1.6.9 until 1.1.3. When I update the game (1.8.7), there is no problem.