I really liked your use of snake case in the title! :)
And in seriousness, it's a very creative idea for a main mechanic you got there. Somewhat a variation on the idea of Lemmings, I think? Would be even cooler if there were a bit more quality-of-life features, like the ability to place blocks throughout the run, without needing to restart.
And very good job on designing the levels, these were very interesting to solve.