It’s an excellent concept! I love the usage of ladders - a combination of horizontal and vertical movement opens up some cool traversal options. However the execution leaves more to be desired. The platforms disappearing after a fixed amount of time from its placement is a poor design choice in my opinion, as this means the player has to place it last second - so any setup and anticipation in “can he cross that?” is lost. It would be better if it disappeared a fixed amount of time after the first contact, not after placement.
Also, the collision needs more work, as the blind man can’t seem to walk over if something is 1 pixel higher than him. Coupled with the moving camera, it can be quite frustrating to place things precisely. The number of platforms available also don’t show up until the first one is placed; this should be shown at all times even before the blind man starts walking.
Overall, I see a good potential in this game. If more work was put into it, I’m sure it could be awesome. Good luck!