Thanks a lot.
The bug at the beginning comes from the fact that I messed up with the tileset and put a tile without collisions at that place so the player fall below the level. I think it is the only place where it happens.
I didn’t realized it was a bug for a long time because the bug was very strange (the jump height and the movement speed may change depending of the computer)
It is now fixed however.
I personally use godot, it's an excellent engine. It uses three languages: - C# - GDScript (language specific to the engine, very easy to learn) - GDScript but in visual scripting
If you want to give it a try, I recomand you the GDquest youtube channel who made a great tutorial serie for getting started:
You should allow jump if player left the platform a few milliseconds before or if he touch ground a few milliseconds after hitting [W] key. But great game, nice idea and looks good.
I originally made glucose molecules, but try to do these things with nice look and working collisions. So I took that clean hexagon insteand, much easier.
