Just some improvement ideas
The robot moved a bit too slow, the last level, I just sat there waiting for the robot to finish.
A check for "holding" a crate. On the last level, I had to check if there was a pit in front of the robot to signal that there are no more crates and it worked well, but it would of been more efficient to check if the robot was holding a crate.
Overall, good game for a 72 hour project, don't worry about the improvements, it was just a game-jam game. It was fun.