One of the better Ludum Dare games I've seen. Considering this was made in 72 hours, this is pretty good. People underestimate the power of comedy in a game, and I feel like that's really what reeled me in this game at the beginning. I'd just like to commend you on that before I get started.
Considering the fact that there were two people in the game, you missed a lot of opportunities to take advantage of that. There were only two short situations in the game where the fact that there were two people was taken advantage of, which was disappointing. Adding more stuff to do with two people would have been a good idea.
Dialogue was made pretty poorly. For the most part, it went by a little too fast and it was kind of difficult to read. What was even worse is that with the amount of movement going on, I couldn't read what they were saying at all because the dialogue would just kind of overlap with each other. If you had placed the dialogue at the bottom of the screen instead, for example: "GIRL: I'm saying dialogue!" then it would have been a lot more convenient.
You had a pretty good story, which is pretty much the only way you can make a good game in 72 hours. However, the story could have been so much more. There was really no interaction between the two characters. On rare occasions, they would say a few words to each other, but other than that there was really nothing. So I didn't really feel any connection to the characters, which is something that's important to have, especially in a story-driven game. Let's be honest, this was a pretty basic platformer, so you need to have a good story to back it up.
The ending was terrible. Probably the worst ending you could have had, to be honest. Maybe it's because I didn't look for a secret ending, but you're just dumped into a box with music playing. There's no depth to it. The least you could have done was just a bit of dialogue between the two characters. You know how kids are forced to eat their vegetables for dessert? This is the equivalent of forcing kids to eat their vegetables for like an empty can of beans.
Beyond this, it was a pretty good Ludum Dare game. If you had added just a bit more dialogue, placed it at the bottom of the screen instead, and added a better ending, this would have been a five star game. Nice job, though. If this is something you can accomplish in 72 hours, I'd love to see what you can do given a few weeks.