Hi Beorgames, thank you very much for playing and for your feedback - I really appreciate it. Actually, I have some ideas on the backlog: such as adding power-ups and fine-tunning the platform generation algorithm. On the other side, I want to move to other projects to keep learning new things and get more confident with Unity. But probably I will come back to this project and improve it some day.
Coming to your point, It is design to increase the down distance to next platform greater than the up distance so it may happend that you cannot undo your steps (so you have to plan carefully adding some strategy to the game). However, it may also occur that some platform is unreachable. I tried to optimize that so it might happen very few times but I cannot guarantee that is not happening at all.