Pretty fun idea to make the command blocks immovable only allowing the player to move the loop commands and it makes for some quite challenging puzzles! If I had to point out some negatives, it does have somewhat glitchy graphics, the blocks seem to have an arbitrary range that would be nice if was communicated better, and on later levels it is a bit annoying to have to remake the code when the frog jumps in water. None of these are that big of a problems, though. These are some rather minor negatives. Pretty good game overall, would recommend.