@jmob22 -- Best way to do this is to use the Victory Tracker and the Scoreboard. Still searching for a good video to show you....but if you get those two toys out, you may figure it out pretty quickly.
@Dexter26 -- The Replayer is going to be your friend on this one (and Trigger Areas).
[others may have a more efficient suggestion, but here is what I'm thinking]
Build out the correct path of blocks. Then, use your Replayer (start recording) to build the incorrect paths. Stop Recording. Set the Trigger Area above a wrong block to trigger a 'Clear' on the Replayer. (You'll need to link a Trigger Area for each incorrect block)
Now, if you want the entire incorrect path to disappear each time, then you can use one replayer [potentially makes it easier for the player to figure out/see the correct path]
If you want ONLY the incorrect block that is being jumped to...to disappear, then you will need a replayer to record the building of each individual block -- so potentially, quite a few replayers.
I've seen this done in a recent Up-themed Featured Toy Box and am assuming this is roughly the way it was accomplished.