Hey, from reading the description I understand that you planned to/added a variety of levels to the game. Which is ambitious for a game jam. But keep in mind that when you do that it becomes more likely that a break in the sequence ruins the whole play session. For example - a player gets stuck on level 1 and can't experience the other 3 levels. For that reason it is a good idea to include a menu which allows the player to select the levels. That way you guarantee that the player gets a chance to experience what all that you made.
Good luck!